Power down your Mac and boot it back up with the Option key pressed down. With the USB installer disk plugged into your Mac and everything backed up, follow the steps outlined below.ġ. Once you are done, return to this tutorial for further details. How to Create macOS High Sierra USB Installer Drive for Clean Install.Check out our tutorial here on how to create one. If you are opting for the clean install route then having a USB installer disk is a must. But just in case, here is the list of compatible Mac computers with macOS High Sierra.Ĭreate a macOS High Sierra USB Installer. The installer copies files to the drive and displays a progress bar. Provide your admin password and choose the Add Helper button. Select the Mac startup drive and select Install. But if your Mac can run macOS Sierra then it will be able to run macOS High Sierra just fine. Select Continue, scroll through the terms, and choose Agree. This includes a portable hard drive, a DVD (if you prefer the old-school style of backing up files) or a USB flash drive if you don't have much data to worry about. But, if you want things to go through quicker then opting for an external storage medium is the way to go. If you have opted to purchase a ton of storage on iCloud Drive itself, then copy your files to the cloud.
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