

Therefore, before installing macOS High Sierra on your Mac, check your Mac storage before the upgrade. You would fail to install the new Mac OS if there is not enough space for the update. Make sure there is enough space for the update The OS versions that can be upgraded to High Sierra include OS X Mountain Lion v10.8, OS X Mavericks v10.9, OS X Yosemite v10.10, OS X El Capitan v10.11.Ģ. Here is the list of Mac models that are compatible with macOS High Sierra.Īlso, your Mac is required to run on OS X 10.8 or later.

Check the compatibility of the latest Mac OSīefore rushing into anything, you should make sure that your iMac, MacBook Air, MacBook Pro, Mac Mini, Mac Pro supports the latest version of Mac OS.

I would advise installing it to an external drive, you should also check that any third party apps you are using are supported or have updates for Sierra, check here: also check whether any peripherals (printers, scanners, etc) are supported in Sierra, check with the manufacturer. On the supported mac download Sierra, and before it starts the installation look in the Applications folder for Install macOSSierra.app and copy it to a USB stick, or send via network to your old iMac. You will need a copy of Sierra before you start, as your iMac is too old it won't let you download it so you will have to use another mac that is supported to do this. Please make a backup of your current system prior to attempting this. So if you look at this, 977128/ and follow the instructions from dosdude1 and foxlet you should be able to get Sierra running on your mac.
