Make a backupīefore installing any upgrade, it’s a good idea to back up your Mac. If your Mac isn”t compatible with macOS High Sierra, the installer will let you know. To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . MacBook Pro introduced in mid 2010 or later MacBook Air introduced in late 2010 or later Your Mac also needs at least 2GB of memory and 14.3GB of available storage space. You can upgrade to macOS High Sierra from OS X Mountain Lion or later on any of the following Mac models.
Mac OS X High Sierra 10.13 Item Preview MacOSHighSierraDesktop.png. Leading into this, some Apple fanatics opted to install macOS 10.13 High Sierra early via. Starting with Firefox version 49, Firefox requires Mac OS X 10.9 (Mavericks) or higher.
