Once the download has finished, you'll see a macOS High Sierra installer launch.Download progress will appear in your Purchases tab. Click Download to initiate the download, and fill out your Apple ID information if prompted.Once you've backed up your Mac, launch the App Store (located in /Applications) and search for macOS High Sierra.Wait for the Time Machine backup to complete before continuing with the macOS High Sierra installation.įollow these instructions to install the macOS High Sierra update on your Mac. A progress bar will appear in the Time Machine system preference pane.If not, open System Preferences > Time Machine and click Select Backup Disk.An alert may appear asking if you want to use the drive to backup your Mac. Choose a new hard drive, or one that you don't mind erasing.
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