Published on September 11th, 2017 | by Brad Gibson


‘Apple TV 4K’ debuts Tuesday and we already know a lot

A leak of details buried inside a new version of Apple’s iPad and iPhone operating system has revealed a pleathora of facts about the much-anticipated 5th-gen Apple TV streaming set-top box a little more than 24 hours from it’s expected announcement at a special Apple event on Tuesday in Cupertino, Calif.

According to game developer Steve Troughton-Smith through his Twitter account, code from the Golden Master version of iOS 11 has revealed these reported features in the new fifth-generation Apple TV…

  • The new device is identified as the “Apple TV 4K”, although there is no definitive evidence the new set-top box will be called that officially. It’s possible that name as listed in the code could simply be a identifier.
  • Comes with a three + three-core A10X Fusion processor. The current, fourth-generation model uses a dual-core, 64-bit Apple A8 chip.
  • Comes with three gigabytes of SDRAM. The current, fourth-generation model has two gigabytes of LPDDR3 SDRAM.
  • Is capable of playing 4K video at 60 frames per second.
  • Will output in 2160p (1080p@2x) UHD resolution.
  • Supports both Dolby Vision and HDR10 formats.

Discovered in a code string for automated hardware troubleshooting was information confirming the 4K streaming capability with require an Internet connection speed of 15 megabits per second or above to guarantee the ultra high resolution picture.

Troughton-Smith also found evidence of support for chroma subsampling, a form of compression that sacrifices color information for luminance data, is available in 4:2:0, 4:2:2 and 4:4:4 for HDR10 and standard YCbCr.

The code did not reveal further details on the maximum storage capacity of the new model or models.


About the Author

Brad is co-founder and editor-in-chief of He has been a technology reporter since the late 1980s having previously worked for MacUser, MacFormat, and iCreate magazines, as well as,,,, and He hosted and produced the MacFormat This Week podcast for three years. He was also a reporter, editor, and producer for the AOL, the BBC, Associated Press, and United Press International.

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