
Another option would be to use a virtualisation app, like Parallels where you can run an earlier version of the macOS.Allowing you to keep Mojave and switch between the OS versions as required.
#NEED TO DOWNGRADE MAC OS INSTALL#

Another reason you need the backup is that the process of downgrading includes erasing the start-up drive from your Mac. This will ensure that, if something should go wrong, you can recover your data and start again without having lost anything. You should always start this process with a backup. Whatever the reason, you can downgrade from macOS 10.14 and revert to an earlier version by following these steps: Maybe Mojave is just performing poorly on your system, or perhaps one of your favourite or critical apps hasn’t yet been updated for Mojave and you simply need to downgrade the OS to be able to keep running an older app. But even with all of these new capabilities, a few of you may find yourselves wishing you could go back to one of the previous versions of the Mac operating system. MacOS Mojave has a great deal going for it, with lots of new features, new security and privacy safeguards, as well as new apps such as News and Home.
