If the file is not already on your Mac, find the macOS version you want to install on the Mac App Store (for macOS High Sierra, use this link to the Mac App Store) or at Apple’s Downloads site for macOS. You may already have the installer file on your Mac in your Applications folder as a single Install file, such as Install macOS High Sierra.

You need a copy of the macOS installer to downgrade from macOS Mojave. To create a bootable installer, you need to have the macOS installer file downloaded onto your Mac. And then restore any files missing from that older backup.

If you have an older backup available from the previous macOS version, you can restore using that older backup. If you try to restore using the backup you made with the newer version of macOS, it installs that version of macOS too–defeating the downgrade process. You cannot do a full disk restore from a Time Machine backup created in macOS Mojave or whatever macOS version you are downgrading from. If you don’t regularly backup via Time Machine and don’t have TM backup available for the macOS version you are downgrading to, once you downgrade you can only do a file restore for individual files and folders. Here’s an alternative way to perform a quick backup of your MacBook. We use Time Machine to perform our backups and it is really easy. Because the downgrade process includes erasing your Mac’s startup drive, it is imperative that you make a backup of all your Mac’s information. With a backup, you can still recover your data, no matter what. We back up our data just in case something goes wrong during the downgrade process. If you are using iCloud Drive to store documents or folders, make sure that they are synced appropriately so that you don’t end up losing any critical work in progress documents.

Here’s what you should knowīackup your MacBook before macOS downgradeīefore attempting to downgrade from macOS Mojave, make sure to back up your Mac.

How to Prepare your MacBook for macOS Mojave.

App Store Not Working After macOS Mojave Update, Here are some Tips.

Easily change your Lock Screen background on macOS Mojave.

Need to run 32-bit apps on macOS Catalina? Use a Mojave virtual machine.

Installing new macOS version on your MacBook.

For downgrading from macOS Mojave, we will walk through the 5 essentials steps. This short guide shows you how you can go about downgrading from macOS Mojave into earlier macOS versions.

You have downloaded macOS Mojave and given it a try! For some reason or the other, you have decided to downgrade from macOS Mojave to macOS High Sierra or earlier macOS versions.

Disk maker x high sierra