Does QuickTime support 10-bit?
You can now export clips as QuickTime H. 264 10-bit movie files. New H. 264 QuickTime encoding profiles are now available when exporting QuickTime movie files.
Does Mac support 10-bit color?
10-bit colour and wide-gamut support: Most displays can render 16.7 million colours (they're 8-bit panels) while Apple claims that its new MacBooks manage to render over a billion (these are 10-bit panels). That's about 60 times more colour than a traditional 8-bit display.