MICHAEL ZHANG, PETAPIXEL:
"OS X El Capitan added some major features to the operating system when the update was released at the end of September 2015, but it appears that there was a pretty significant one that didn’t receive as much fanfare: 10-bit color.
"The German website 'Mac & I' reports that OS X El Capitan is the first OS X version that makes use of 10-bit drivers (30-bit color RGB) for the company’s latest computers.
"The 4K and 5K iMacs have been confirmed to make use of the 10-bit drivers (whether or not they all have capable displays has not yet been confirmed). Other people are reporting that newer Mac Pros can also output 10-bit color using compatible monitors.
"The new output lets you potentially see over a billion colors instead of the 16.8 million that you get with 8-bit color — huge for photo editors and other creatives who do high-end work with photos, videos, and graphics."
Technological improvements such as this are definitely worth paying attention to. However, it should be noted that these kinds of development usually trickle down slowly at first to the high-end pros then faster and faster to the general public. Because of this, "improvements" cannot be "seen" immediately. Still, we know that in time, it's coming to one and all.
Anyway, for now, read more about it, here.