How do you check Mac OS version?
How to Find Your OS X Version Number Click the Apple icon at the top left of your screen. Choose the first item in the menu, “About This Mac.” Take note of your Mac operating system, both by its codename and its version number. For instance, this is v10.10.5, also known as Yosemite.
DA: 13 PA: 55 MOZ Rank: 6