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OWC ThunderBlade - up to 2800MB/sec and 8TB

Tips, Troubleshooting and How-To Guides for Mac/OS X/iOS Users
About Thunderbolt, HDMI, USB 3.0, Wi-Fi/Bluetooth, AirPrint, AirPlay, FaceTime, iCloud, OS X Troubleshooting, more.
Last Updated: Sept. 24th, 2018 -
(Previous Updates: and )
, , ,
4K HDR/Dolby Vision, , Touch ID/Face ID,
added doc on Single sign-on, , , topics updated
Updated , , , , , topics)

For new Mac owners, or anyone wanting to learn more about later macOS versions/features, here is a listing of Apple's Mac Basics How-To articles, Specs, FAQs and Tips for Mac and OS X Users. (iOS info also added.) Includes guides to troubleshooting problems, backups, restoring, reinstalling OS X, and more.

This page also has links to Apple FAQs and Guides on HDMI, Audio, AirPlay, iTunes, Apple TV, CD/DVD sharing, USB, Apple Display Adapters, Mini DisplayPort, Thunderbolt, USB, Firewire, Tips for iOS/iPhone/iPad/iPod Touch users and a list of Airport Utility and Firmware Updates for Apple Base Stations and Time Capsules. (Also tips/guides on .)

Plus important tips on what to do with your personal files/data your Mac or iPhone/iPad, and what to do if your Apple product is (and beforehand).

(Note: If you get a 'file not found' (404) on a link, try again later as article may be in process of being updated. It may also be removed. Apple's CDN network has been frustrating at times, including access denied errors. Some articles have been archived but may still be useful for users of previous OS X versions.)

  • How to
  • (very brief intro, now archived)
  • How to
  • (archived)
  • How to

  • (now archived)
  • (now archived)

  • How to


  • How to
  • How to
  • How to

  • (now archived)

  • (was titled "Unable to type while Mouse Keys is enabled")

  • How to
  • (now archived)

  • How to
  • (now archived)
  • (now archived)
  • (with Tips)
    (link disabled as article no longer online)

    Using Dictation and Voice Commands in OS X:
  • How to in macOS Sierra
  • How to
  • How to


  • (archived)
  • (archived)
  • How to

  • (was titled "How to set up and use an external Mac startup disk")


  • (now titled "Use Spotlight on your Mac")

  • (was titled "Spotlight: How to re-index folders or volumes")




  • "About the transition to 64-bit technology and how it affects 32-bit apps."
  • How to


  • (early article)
  • (new DU home page)

  • (- now goes to )
  • (now archived)

  • How to
  • How to
  • How to (archived)
  • How to
  • (now archived)
  • (now titled "Use Notifications on your Mac")
  • (now titled "How to install and remove fonts on your Mac")
  • (now archived)
  • (now archived)
  • How to
    (now separate article on )
    About Restrictions and Parental Controls
  • How to
  • How to
  • How to
  • (with info on HTTPS limits)
  • How to
  • (archived)
  • (archived)
  • (with list of servers & compatible printers)
  • (now archived)

    OS X Printer/Scanner Drivers and Software


  • (Often it's better to get software/updates from your Printer brand's website)

    (Owners of RAID card for Mac Pro/Xserves, see for info on enabling sleep)

  • (Didn't want my Mini to auto-shutdown after hours of sleep, so tried .)
  • (with list of macs that support it)
  • with list of supported Mac models. (now archived)
  • (now archived/no longer updated)
  • (archived)
    (HT3789 Doc on
    removed by Apple due to changes in OS X Yosemite)
  • (for Macs with T2 chip)
  • (for Macs with Apple T2 Chip)
  • (for Macs with Apple T2 Chip)
  • (OS X El Capitan and later)
  • How to
  • How to
  • (about Apple product security key, PGP)
  • How to
    (no longer has a list of supported Macs)

    Avoiding Malware and Adware


  • (was titled "Remove adware that displays pop-up ads and graphics on your Mac")

  • (and )
  • (and )
  • About
  • About

    Updating macOS/OS X and Apps

  • Mac App Store Info/Troubleshooting:

  • (was "Troubleshooting the Mac App Store")
  • (Apple Books was "iBooks Store")

  • (now goes to " apps, music, movies, TV shows, and books from the App Store, iTunes Store, and Apple Books."
  • (now archived)
    (No longer has downloads for latest updates, nor lists the latest version numbers.)
  • (now archived)
  • How to

  • ("Starting with macOS High Sierra, an additional snapsnot is saved before installing any macOS update.")
  • (now reverts to above)
  • How to using AirPort Utility
    (Includes what to do if you're selling or giving away your AirPort Time Capsule)

    iMovie Tips & Info

  • (doc removed as of 2016)
  • (now archived)
  • , listed by Brand and Model

    About OS X QuickTime Player   (see below for )

  • (version 10) to play, record, edit, and share audio and video files on your Mac.
  • (using Quicktime Player)

  • (may help if you have older media formats or workflows that require an older version of QuickTime Player.)
  • (now archived)
  • (now titled "If an audio or video file doesn't play on Mac")

  • (with supported models list)
  • How to
    (Bluetooth info below)

  • (New article, since Apple has stopped making their Airport Wi-Fi bases.)
  • How to (info for OS X 10.8 or later)
    (was titled "Use Wireless Diagnostics to help fix Wi-Fi problems on your Mac" in OS X 10.8.4 and later)
  • (Info for OS X 10.7.x or earlier)
  • (archived)
  • (OS X v10.6 and later)
  • (archived)
  • (article was removed)
    It included how to check System Information to find out which version of "Incompatible Kernel Extension Configuration Data" is installed. If you have version 3.28.1, you need an update.
  • (with list of Base Station models)
  • (now archived)

  • (original "AirPort Express frequently asked questions (FAQ)" article HT201577 no longer online)

  • (How to use an Airport Express as an Ethernet to Wi-Fi bridge for a device without built-in Wi-Fi)

    Airport Base Firmware Updates and Airport Utility Software

  • For Info on AirPlay setup, see the
  • How to
  • (archived)
  • (iOS 9 or later)
  • How to
  • (enterprise, static, proxy settings)
  • How to
  • How to
  • How to
  • (now archived)
  • How to

  • (was titled "Share your Internet connection with Personal Hotspot")

  •   (see above for )
  • (now archived)
  • (now archived)
  • (by Country)
  • (now archived)
  • (was "How to connect with File Sharing using SMB")
  • Tips for in OS X Lion or later (now archived)
  • How to (article no longer online)

  • (now titled "Use the kickstart command-line utility in Apple Remote Desktop")


  • For latest info on Safari, see
  • How to
  • How to
  • (now archived)
  • (now archived)
  • in OS X Snow Leopard (now archived)
  • Tips for Safari Problems

  •   (See below for )

  • How to
  • (now archived)
  • What to do
  • How to (troubleshooting)
  • What to do
  • What to do
  • How to
  • (also see )
  • How to
  • What to do
  • (now archived)
  • How to

  • (Sometimes apps that did this also created a mail account that could not be removed the usual way.)
  • (archived)
  • How to
  • How to
    (If you have , you can't receive message effects.)
  • How to
  • How to
  • to communicate with Apple and other businesses using Messages.
  • How to
    "With iOS 10 and later, you can use Digital Touch to send sketches, taps, or a heartbeat from the Messages app."
  • How to
  • How to
  • How to
  • How to
    (was titled "Use Siri on your iPhone, iPad, or iPod touch")
  • How to
  • How to (archived)
  • List of
  • List of
  • Guide to (built-in camera and/or camcorder)
  • Mac Basics with Image Capture and Preview. (Your specific printer brand's website/support page may also have scanner software that better supports its features. Check there for software/driver updates as some OS X updates may affect function.)
  • How to
  • How to
  • How to
  • How to
  • How to
  • (was titled "Get started with Photos for OS X")
  • How to
  • for macOS and iOS
  • How to
  • How to
    (See below for Tips/Guides on )
  • How to
  • How to (doc no longer online)
  • (Tips from apple forum)
  • You can also check and (covers iOS and Macs)
  • (needs updating)
  • (now archived)
  • How to
  • How to
  • How to
  • How to
  • How to
  • (now archived)
  • (now archived)
  • (now archived)

  • with a long list of Incompatible Discs
    (now titled "Use the CD or DVD drive from another computer with your Mac")

  • (now titled "How to connect the Apple USB SuperDrive")
    (Old compatibility mod (IF enough USB power supplied) was sudo nvram boot-args="mbasd=1" from terminal.)
  • with recordings of example noises.
    (Link removed as HT201623 article no longer online as of 8/7/2017 check)

    (The 3 guides below are now listed as 'archived, no longer updated)

  • Adding Disc Eject to OS X Menu Bar
    In the Finder navigate to /System/Library/Core Services/Menu Extras and double click the Eject.menu item.

  • How to (now archived)
  • (now archived)
  • How to
  • (now archived)
    (Also see notes on )

    Audio Interfaces, Input and Output Tips

  • How to
  • How to
  • (now archived)
  • How to for Multi-Output or an aggregate device
  • (now archived)
  • (now archived)
  • (now archived)

    Audio Tips for iPhone, iPad, iPod Touch

  • How to
  • (HT203439) article no longer online but said "Upgrade to GarageBand for iOS 1.0.1 (or later) and iMovie for iOS 1.2.1 or later" to fix.

  • (was titled "Set up CarPlay with your iPhone")

  • (see below for iTunes Store topics)
  • (has current info)
  • (Now Archived as of Sept. 2018)
  • How to
  • How to (now titled "How to AirPlay audio")
  • (version updated Sept. 12th, 2018)

  • Apple's
    includes a link to download iTunes 12.6.5 with built-in App store.
    (I assume v12.6.5 supports iOS 12 devices. The 12.6.4 update allows syncing of iOS 11.3 (and later) devices, which v12.6.3 didn't.)

    iTunes for OS X 10.6.x and earlier:
    Current iTunes versions don't support OS X 10.6.x users, but here's .
    (FYI to PowerPC Mac owners, was last version with PPC support. Per a note down the page (later pulled), the last compatible iTunes version for OS X 10.5.x is and for OS X 10.4.x it's .)

  • How to
  • (Library.itl, iTunes Library.xml)
  • What to do or an "!" is next to an item in your library
  • If your (now archived)
  • How to
  • How to
  • How to
  • How to (now archived)

  • (now goes to )
  • (Error code numbers and troubleshooting)
  • (now archived)

  • (Includes info on )
  • (below has )

  • (was "Advanced iTunes Store Troubleshooting")

  • - "Learn how to fix a -45054 error on a Mac or PC. If files or folders that iTunes uses to download purchases are restricted, you might see an alert message that reads: "We could not complete your iTunes Store request. An unknown error has occurred (-45054)."

    iTunes Radio Info

  • How to
    (replaces older doc "common questions on iTunes Radio")
  • How to
  • How to
  • How to (now goes to above article)
  • How to (now titled "Turn on iCloud Music Library")
  • How to
  • How to
  • How to
  • How to
  • How to

    Apple Music for Android Info:

  • How to
  • How to (troubleshooting)
  • How to
  • If your country doesn't have Google Play,
  • How to (from google play store)

  • "On May 25, 2018, Apple will introduce security changes that prevent Windows XP or Vista PCs and Apple TV (1st generation) from using the iTunes Store." (Some Apple TV gen 1 users had already reported no support with iTunes 12.7.)
  • (USA)
  • How to apps, music, movies, TV shows, and books from the App Store, iTunes Store, and Apple Books.

  • (login at reportaproblem.apple.com)
  • How to
  • How to
  • How to
  • Tips for to play purchases
  • may prevent iTunes authorization (article apparently removed)
  • How to
    (Also see .)

  • (was "About Disney Movies Anywhere and iTunes Store")

  • ("You can download a local copy of an HD movie, and you might be able to download HDR and Dolby Vision versions, but you can't download a 4K version.")

  • (now titled "If you can't view your iTunes Extras")
  • How to
  • iPhone, iPad, iPod Touch Syncing with iTunes, or iCloud

  • (now archived)

    Troubleshooting iTunes connecting to iPhone, iPad or iPod Touch

  • What to do

  • iPhone, iPad, iPod Touch Update and Restore
  • How to
  • What to do

  • (Encrypted iTunes backups can include information that unencrypted iTunes backups don't - like saved passwords.)
  • (was "find and manage your iTunes backups")

  • (now titled "Restore your iPhone, iPad, or iPod to factory settings")

  • (includes AirPlay 2 and compatible devices/speakers)
  • How to via an Apple TV.
  • (How to)

  • (was titled "Use AirPlay to wirelessly stream content from your iPhone, iPad, or iPod touch")
  • Troubleshooting (includes Mac, iPad, iPhone, Apple TV)
    (was titled "Get help using AirPlay and AirPlay Mirroring on your iPhone, iPad, or iPod touch")
  • How to
    (now titled "About AirPlay restrictions and Conference Room mode on your Apple TV")
  • How to

  • How to to nearby Macs and iOS devices
  • How to
  • (was "Troubleshooting Home Sharing")
  • How to
  • How to
    (A Mac/PC, iPhone, iPad, iPod Touch or Apple TV)
  • How to
  • About
  • How to
  • About
  • How to
  • (now "Get help using Back to My Mac")
  • (was "Set up security options for Back to My Mac")

  • (Originally titled "Double NAT configurations may prevent Back to My Mac connections")
    (see below for )
  • How to (new for 2018 models)
  • (with system requirements)
  • How to
    (was titled "How to use multiple displays with your Mac")
  • How to with OS X El Capitan or later.

  • (previously was "Troubleshooting internal and external displays.)
  • How to
  • How to
  • (archived)
  • (archived)
  • FYI Here's our page with including display configurations.
  • with an external display

    Using an iMac as an External Display (via ThunderBolt/MDP)


  • now routes to .
    (Includes list of compatible 2009-2014 iMacs - but not Late 2014 27in 5K Retina iMac)
  • (How to)
  • (How to)
  • (now archived)
    (for sharpest text, avoid overscan if possible. Set HDTV to non-scaled display mode. Called "Screen Fit" by Samsung or "Just Scan" by LG.)
  • (now archived)
    Includes note to make sure Mini DisplayPort adapters are Vesa 1.1 compliant.

    (FYI: If you have a 2012 or later Mac mini with FileVault enabled and the display doesn't wake from (safe) sleep, says a workaround is to type in your password (despite having no video), which will log you in and wake the display.)

  • How to
  • (as of March 2016 Apple appears to have removed this article (HT203514). Sometimes it's temporary but often not. They do this so often it's frustrating. I wish they would list docs like this as archived instead of removing them.)

    How to Adjust Brightness on a Second Apple Cinema Display
    With an Apple keyboard, hold the Control key down while pressing the Brightness key.
    (IIRC it was the Control key instead of Option but don't have a 2nd display to test now.)

  • How to (macOS 10.13.4 or later)
    With a list of supported eGPU configurations - Thunderbolt 3 chassis & graphics cards.
    Here's the list of supported Mac models (doesn't include 2013 Mac Pro that has Thunderbolt 2):

    "eGPUs are supported on MacBook Pro notebooks released in 2016 and later(1), iMac computers introduced in 2017 and later, and iMac Pro. Your Mac must also have macOS High Sierra 10.13.4 installed..."

    1. If you're using a 13-inch MacBook Pro from 2016 or later, always plug eGPUs and other high-performance devices into the left-hand ports for maximum data throughput.

    Article also has notes on app support and link to developer page on .
  • in OS X El Capitan and later.
    (Although not listed in the article, Metal/Metal 2 support is shown in System Info on pre-2013 Mac Pro Towers with a Graphics card that supports Metal installed with a compatible OS. See System Info screenshots on our page of reports on running macOS 10.12.6 or later, including High Sierra.
  • (only lists OEM cards)
  • Setting Graphics Performance on MacBook Pros with onboard and discrete GPUs

  • Apple LCD Display Power Light is Blinking - what does it mean?
    See info the error codes for

    LED Cinema Display Audio Tips/Troubleshooting

  • (now archived)
  • (now archived)

    Info on Apple AC/Power Adapters for older DVI Cinema Displays

  • (archived)
  • (archived)
  • (archived)

    Mac Mini specific tips on HDMI/Audio/TV (see above for main )

  • (archived)
  • (archived)
  • (now converts to )
  • (now archived)
    "The audio controller hardware in Mac mini (Late 2012) supports up to 96KHz audio input and output", correcting a mistake in the original specs that listed 192KHz max. (As of Jan 17, 2017 revision, the article title and text still has "Hz", which should be "KHz".)
  • Connecting an iOS Device to a TV see below for .
  • (now "Connect to HDMI from your Mac")

  • (was titled "iMac (Late 2012 and later): External features, ports and connectors")
  • - now routes to
    (HT202638 2012 Mac Mini Ports/Connectors article incorrectly listed 192KHz support for Audio. )
  • (Archived)

  • (was titled "Thunderbolt ports and displays: Frequently asked questions (FAQ)")
  • How to
    (includes links to Apple's Thunderbolt 3/USB-C Adapters)
  • How to

  • (MacOS now disables loading external drive custom boot ROM. Page has a workaround and a terminal command for Early 2015 and older macs to restore function with needing special keypresses at every boot.)
  • (now goes to "OS X Yosemite: If a USB device isn't working". No Firewire info.)
  • (with USB-C info)
  • (now archived)
  • (now archived)
  • How to (updated for thunderbolt)
  • (and list of compatible Macs)
  • (and list of compatible Macs)
  • (now archived)
  • (fixed in Adapter Firmware v1.03)
  • (Firmware update released in 2009)
  • now titled "Send audio and video to HDMI displays through Mini DisplayPort"
    Includes list of Mac models that can output multichannel audio over Mini DisplayPort as well as video.
    (As of August 2017, article is 'archived, no longer updated'.)
  • What to do if in software update or Thunderbolt ports and Target Display Mode don't work after updating. Includes notes this may be caused by having a self-powered Thunderbolt device connected when the update is applied. (Article now archived.)
  • (HT202606 was archived, but now removed)
  • article (HT1454/HT204231) with info on older docks & AV cable kits no longer online
  • How to

    About iPhone, iPad, iPod Touch connections via USB in iOS 11.4.1 and later

  • notes
    "Starting with iOS 11.4.1, You might need to unlock your passcode-protected iPhone, iPad, or iPod touch to connect it to a Mac, PC, or a USB accessory..." (See linked article for more details.)
  • (archived)
  • ( ended 1/31/2014)


  • (archived)
  • (Original & Early 2009 versions)
  • (archived)
  • (archived)
  • (archived)
  • (direct link)
    ("Instructions for setting up RAID volumes on a computer with a MacPro RAID Card or Xserve RAID Card.")

  • (Above is an Apple beta program page, it was made for users of the BETA High Sierra install that allowed Fusion Drives to be APFS, which the macOS High Sierra public release DOES NOT support. (The public release of macOS 10.13 uses APFS for Flash/SSD drives - Fusion drives are a combination of SSD/Flash and a Hard Disk.) The linked page includes a step-by-step guide to converting an APFS Fusion drive back to "MacOS Extended (Journaled)" format. Requires a Time Machine backup to restore/migrate your data to the reformatted Fusion drive using the macOS High Sierra Setup Assistant that runs after the install.)
    )
  • How to (for June 2013 and later Macs)
  • How to (for pre-2013 Intel-based Macs)

  • (Info on Startup tones, POST RAM error codes in section.)
  • (now archived)
    (Errors "4 SNS/1/40000001: IDOR" and/or "4 SNS/1/40000001: VPOR")
  • A General Guide to
  • Troubleshooting
  • (possible causes and tips)

    Reset macOS/OS X Login or Account Password

  • How to
  • How to
  • (archived)

    (some articles renamed "OS X" to 'macOS')

  • (now archived)
  • (archived)
    (If you have Filevault + Mac Firmware Password enabled. Includes steps to resolve.)

  • (See for info on making a bootable installer, reinstalls/recovery, etc.)
  • How to
    Includes notes on supported Graphics cards. Looking for feedback for our . Reports on other graphics card models are also welcome of course. (Some 2009 Mac Pro owners have flashed their EFI/bootrom to Mac Pro 5,1 (2010-2012) for later macOS support.)
  • macOS 10.14 Mojave -
    "If you have an iMac (27-inch, Late 2012) with a 3TB hard drive, you must remove its Boot Camp partition before you can install macOS Mojave 10.14. After you upgrade to macOS Mojave, you won't be able to use Boot Camp to install Windows on this Mac."
  • How to

    "When you install macOS High Sierra on the built-in solid-state drive (SSD) of a Mac,
    that drive is automatically converted to APFS.
    Fusion Drives and hard disk drives (HDDs) aren't converted.
    You can't opt out of the transition to APFS."

    Includes info on APFS compatibility with Mac OS Extended (HFS+), FileVault, Boot Camp, file sharing, and Time Machine.
    (Also check , Apple's , and
    sponsor OWC's blog post on .)
  • How to
  • How to
  • How to
  • How to
  • How to (now Archived/no longer updated.)
  • (for system administrators)
  • (now titled "How to select a different startup disk")
    Includes a tip if you can't boot from an external drive as some have reported after installing macOS Sierra 10.12.2 update. See the section down the page titled "If you can't select your startup disk or start up from it" that has a note on third-party external devices that use Option ROM firmware and how to turn off a new security feature (not loading option rom) via keystrokes at each boot or via a terminal command. (Terminal command setting is mentioned as an option for Early 2015 and older Macs.)

  • (Original Apple doc with list of , now routes to above.)
  • (now archived)
  • (older OS X article, now archived)

  • (now goes to )

  • (now goes to )
  • (older OS X article, now archived)
  • (archived)
  • How to
  • If your
  • If your (older OS article, now archived)
  • (iMac Pro 2017 has no EFI ROM Tones)

  • (Archived - )
  • (was "... for Intel-based Macs")
    (Doc on no longer online)
  • (now reverts to )

  • (now titled "Use safe mode to isolate issues with your Mac")
  • (now archived)
  • (now archived)
  • (now archived)
  • Zapping the PRAM and Resetting the SMC

  • now routes to .
    Hold the keys down until Mac startup tone is heard 3 times.
    ( had info on what's stored in it, when and why you should reset it.)
  • (Intel-based Macs) How to
    (Includes what to try before resetting SMC, and what problems may be fixed by resetting the SMC.)

    Resetting the PMU (power management unit) on PowerPC Notebooks

  • (archived)
  • (archived)
    (some models are not upgradeable)
  • (2006-2010 models, now archived)
  • (archived)

  • Info on Apple Notebook Batteries and iPhone/iPad/iPod Touch Batteries
  • Apple's Tips for
  • has info on Optimizing battery life, Troubleshooting & Servicing Apple batteries.
  • (now "How to store Apple notebook computers and their batteries")
  • (now goes to above article)
  • About
  • How to
  • How to
  • How to
  • About
    (includes info on iPhone, iPad and iPod batteries as well as Mac Notebooks)
  • (was titled "Runaway apps...")

  • (no longer lists 2008 and older)
  • (no longer lists 2008 and older)
  • (no longer lists 2008 and older)
  • (no longer lists 2008 and older)
  • (no longer lists 2008 and older)
  • (no longer lists 2008 and older)

    Info/Specs on PowerPC Mac Models (most articles now archived)

  • (Dual Core CPUs, PCI-Express slots)
  • (Last of the AGP and PCI-X slot models)
  • (AGP Slot for Graphics Card + PCI-X slots)
  • (AGP Slot for Graphics Card + PCI-X slots)
  • (AGP Slot for Graphics card + PCI-X slots. All Air cooled)
  • How to

  • If your
  • (now just "how to restart..."_

  • (now archived, but links in article for specific problems still work as of Sept. 2017.)

  • (includes ports/connectors info)
  • How to (now includes Apple TV 4K)

  • (Also see footnote about HDR10 and Dolby Vision frame rates. Some TVs (like 2016 LG OLEDs) don't support 4K/UHD Dolby Vision at 60Hz/50Hz, so 30Hz or 24Hz would be used (or 25Hz for PAL TVs). In those cases Apple recommends 1080P at 60Hz/50Hz instead due to slower interface performance at 25/30Hz.
    Update - Although Apple favors framerate over all else and considers mode switching (24Hz for movies, 60Hz or Interface) a negative due to TV re-sync causing a screen flicker, under "Other Formats" there are 4K options for 24Hz HDR, 24Hz SDR and 24Hz Dolby Vision (if connected to a Dolby Vision compatible TV).
    Update 2: In tvOS 11.2, Apple TV 4K gets . (See new - Automatic 4K Apple TV Video output switching of HDR/SDR and refresh rate to match the original video's content. tvOS 11.2 added a "Match Content" option in the Video Settings. Resolution doesn't change, but the option for HDR/SDR & frame rate matching with the original source is a big plus that many wanted. I think this will both increase sales and reduce returns.)
    Update 3: tvOS 11.3 added Apple TV 4K support for the "low latency" Dolby Vision profile used by some Sony 4K/UHD TVs. (It's the first HDMI device to support the Dolby Vision profile used by Sony, which is different than the Dolby Vision profile used in other TV brands like LG, TCL and Vizio.)
    Update 4: tvOS 12.0 added support for Dolby Atmos - see .

    The above Apple doc recommends cables with a "Dolby Vision mark" - tested with 4K Apple TV they say. (Their example is .95 at Apple's store and its specs list "up to 48 Gbps" - that's next-gen HDMI 2.1 spec's max rate and more than double the Apple TV 4K's listed HDMI 2.0a port spec.)

    I've never seen a 'Dolby Vision' marked (or 48Gbps) HDMI cable yet, but for HDMI 2.0 4K/UHD HDR/DV I'd suggest a , as short as possible. 6ft Certified Premium HDMI 2.0/18Gbps cables are under at some sellers. (There's also a free to verify the code on the box label.) I've seen them work reliabily with a 4K HDR10 60P movie, although DV on 4K discs are typically 24P. (HDR10 is 10-bit and DV supports 12-bit, but both are within the HDMI 2.0x spec using correct output settings. The test Oppo 203 set to "HDR Auto" always output 12-bit 4:2:2 to the 4K LG OLED, even with HDR10 discs. And per , 4K @60Hz 12-Bit 4:2:2 is supported. (4K60 12-Bit 4:2:2 is appx 17.8Gbps, just under the 18Gbps HDMI 2.0 spec max.) Blu-Ray and HDR10 discs are 4:2:0, DV discs IIRC are 4:2:2. 4K @60Hz/50Hz 4:4:4 isn't supported at 10-bit or 12-bit in HDMI 2.0 spec, too high a data rate.)

  • (in tvOS 11.2 and later)

    FYI: See for article on 4K/HDR/Dolby Vision movies (no downloading of 4K movies).

  • How to
  • How to
    Includes a list of providers and apps that support single sign-on
  • How to
    (iOS 12 added Atmos support. Doc was titled "Surround sound settings on your Apple TV 4K or 4th generation)

    Dolby's Info about Apple TV Audio Settings

  • (4th Generation and later)
    - Includes tips/explanation of 4th Generation and later Apple TV Audio Surround Sound Settings.
    (Apple added Dolby Atmos support with tvOS 12 - see doc above.)
  • How to
  • (tvOS 12 and 11)
  • (tvOS 10 and older, now archived)
  • How to

  • (now goes to article )

    Apple TV Wireless Keyboards and Wi-Fi Help

  • How to
  • How to

    Apple TV Remote Control Info and Tips (hardware remote)

  • How to
  • How to
  • How to
  • How to
  • How to
  • How to (Siri remote or older Apple remote)
  • How to - a guide to learning/programming. (now archived)
    (Some universal remotes like the Harmon series also have Apple TV as a device option.)
  • How to
    (Vision aids on Apple TV, like Color Filters, Reduce White Point, Invert Colors, and more. Requires tvOS 10 or later.)

    About the Apple TV Remote App (released Aug 2016)

  • How to
  • How to
  • App store link for for iOS 9.3.2 or later
  • How to
  • How to
  • How to
  • How to
  • How to
  • (was "Get help with audio, video, or power on Apple TV")
  • (was "Troubleshooting playback performance")

  • (now goes to which finally added a section on "HDCP" as of Jan 22, 2016.)
  • How to
  • How to (with Troubleshooting Tips)
  • How to
  • How to
  • How to
  • How to
  • What to do
  • How to
  • How to
  • How to
  • How to
  • How to
  • How to
  • How to
  • How to
  • How to
  • How to
  • How to


  • (list of devices by type/brand - Lights, Switches, Thermostats, Sensors, etc.)
  • How to
  • How to
  • Info for Hardware and Software developers at .


    info)
  • How to
  • How to
  • How to
  • (with link to )
  • (was "About iCloud Security Code alert messages")
  • How to
  • (Frequently Asked Questions)

  • (was titled "Use iCloud Drive or iBooks to access your PDF files, ePub files, and books")
  • (archived)
  • How to
  • (was "Get help backing up your device in iCloud")
  • (Articles HT204058 "iCloud Backup alert messages" and HT203756 "Understanding alert messages when restoring from an iCloud Backup" and HT201418 "If you need help restoring your device from an iCloud backup" removed as of July 2016.)

  • How to
  • iCloud Calendar, Reminders and Contacts

  • (was "troubleshooting...")
  • How to (was titled "iCloud Photo Library")
  • How to
    (See above for info on for OS X 10.10.3 and later)
  • (automatically creates curated collections)

    iCloud Photo Stream (and Sharing)

  • How to

  • (was titled "Get help using iCloud Photo Sharing and shared albums")
  • How to
  • How to
  • (Above are help/tips with )


    Problems with iCloud Log In or Verification
  • (archived)
    (was "Troubleshooting web browser issues with iCloud.com")
  • (requires 2-factor authentication or 2-step verification)
  • What to Do if You
  • About
  • About
  • How to
  • How to (USB-C model)
  • (now archived)
  • (was "About Windows Migration Assistant")
  • (updated)
  • How to (now archived)
  • What to do (install drivers)
  • How to
    (Hold the Option key while restarting your Mac to choose an operating system. With High Sierra (and later), if you choose Restart in OS X from the Windows Boot Camp menu, you see "Could not locate the OS X boot volume.")
  • (assist via freeware VM .)
  • How to

  • (now titled "Use your Apple Keyboard in Windows with Boot Camp")
  • How to
  • If you see a
  • (archived)
  • (archived)
  • and

(FYI: An alternative to using Bootcamp (for those that don't need maximum performance) is running Windows (or other OS) on a Mac via a "Virtual Machine" using OS X compatible VM software like , or (freeware) . Check requirements for the VM -and- for the software/app you plan to use with the VM OS. The VM software vendor's user forums are also worth checking for info on compatibility/problems/performance. There are also some 'emulators' (i.e. Crossover, Wine) that may be useful, but generally have more limited compatibility compared to running the full OS.)



These are for use when a firmware update fails (not to revert to a previous version). Each has a list of compatible Mac models.

The Firmware Restore CD v1.4 doc links to an even older v1.3, but the link 404's. In case anyone really needs it, here's the that has a D/L link. (Update: D/L link now redirects to Apple Support home as of May 2017.)




  • What to do
  • What to do
  • What to do
  • How to
  • How to

  • (includes tips even if you don't have the iOS device due to theft or lost)
  • About
  • How to


  • (including the computer if it was authorized for purchased iTunes content)
  • How to
  • How to

What to Do Before Sending your Mac or iPhone/iPad/iPod Touch in for Repair



  • Apple's article on - laptops, desktops, iPhones, iPads, iPods, monitors and peripherals.

  • (Reminder: - see Indicators)




Other Resources





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