The human eye can’t tell the difference between 4K UHD and full 4K, but it can when it comes to the refresh rate (Hz). The higher the number of Hz the smoother video appears on the display. TVs and monitors that say they are 4K UHD, or just UHD, have a resolution of 3840×2160. 4K means there are ~4000 pixels per horizontal line. Like 720p and 1080p, 4K is a resolution in which images and video can be displayed on a TV or monitor. SEE THE BEST PRICES ON NEW MACS ON AMAZON
This guide will help you with what you might want to know about viewing and even editing 4K content on a Mac. You may have seen 4K TVs for sale, or now have a device that records video in 4K (iPhone 6S and 6S Plus) and you’re wanting to know more about it.