How to do a clean install of catalina on macbook pro. This erases all data on the mac quit disk utility when finished formatting the disk. Either click on the button or go to the menu and choose edit delete apfs volume. Downloading and installing a new os gives you the opportunity to do some major house cleaning if you so desire.
If you feel like youd like a fresh start with macos catalina you can always opt to do a clean install. Just follow the steps below even if youve already installed macos california.