The operating system that powers every Apple computer is called MacOS. And if you haven’t used Apple products for very long, ...

Apple’s Mac operating system has undergone many sizeable changes over the years. Here’s every version in order, from the first edition in 2000 to the present.

The computer's master control program. When a computer is turned on, a small "boot program" loads the operating system. Although additional system modules may be loaded as needed, the main part ...