But what hasn’t changed is how you get it—following in the footsteps of Mavericks, OS X 10.10 Yosemite is offered as a free upgrade, newly available to download from the Mac App Store.

For those who do not have the means to download Mac OS X Lion, Apple has made available a USB key that can be purchased for $69 via the Apple Store.

MacOS High Sierra is here. Find out if your Mac can run Apple's next computer operating system and, if so, how to download and install it.

Apple allows people who own a Mac to enroll in the macOS public beta program after showing the new operating system at their WWDC conference. Here is how to enroll in and unenroll from it.