support.apple.com/en-us/HT201…
These numbers can help you learn whether OS X is up to date on your Mac. When you install an OS X update or upgrade, you get a new version and build number.
support.apple.com/en-us/HT201…
These numbers can help you learn whether OS X is up to date on your Mac. When you install an OS X update or upgrade, you get a new version and build number.