

Launch Terminal from Applications - Utilities.However, you can also do it in Terminal like this: The easiest way to create a bootable installer is to use DiskMaker X.


Update all your software to the latest-supported versionsĪs you can see, CleanMyMac X does a lot more than just clear out junk files before you backup your Mac.Manage hung apps and heavy CPU consumers.Neutralize Mac-specific malware, like key loggers.It’s the easiest way to clear out the clutter on your Mac. There’s no point in backing up all the clutter along with the files you really need. We’re going to completely erase your Mac’s startup disk, so it’s important to copy anything you need now.īefore you backup, however, you should take steps to remove the junk and clutter from your Mac. So, you should copy those files to an external disk, or a cloud storage service like Dropbox or iCloud Drive so you can retrieve them easily when you downgrade. However, the files you’ve been working on since you upgraded won’t be up to date on that backup. You should have backed up your Mac before you upgraded to Catalina, as you should before you perform any major upgrade or make any significant change to your Mac.
