MICHAEL ZHANG, PETAPIXEL:
"In October 2015, Apple quietly unlocked 10-bit color in its release of the OS X El Capitan operating system update. 3rd party software didn’t support the new color output, so it was limited to Apple’s official Preview and Photos apps.
"That changed this week: Adobe quietly expanded 10-bit (30-bit color RGB) support in Photoshop CC to OS X in the latest update, which also brought Custom Toolbars and a host of other features."
This means, among other things, that "you should now be able to edit your photographs with billions of colors instead of the 16.8 million colors you get with 8-bit color."
For instructions on how to activate it, click here.