

Normally, if you need to reinstall macOS, you can just boot from the recovery partition and do it from there. It’s good protection against a catastrophe striking your Mac’s startup disk, especially if you don’t have a stable internet connection.

#HOW TO MAKE A BOOTABLE USB MAC OS X INSTALL#
You may want to clean install Catalina, in which case you’ll completely wipe your startup disk and will need to boot from an external drive to do that.

#HOW TO MAKE A BOOTABLE USB MAC OS X UPGRADE#
MacOS Catalina is a hugely exciting upgrade for the Mac. But to help you do it all by yourself, we’ve gathered our best ideas and solutions below.įeatures described in this article refer to the MacPaw site version of CleanMyMac X. So here's a tip for you: Download CleanMyMac to quickly solve some of the issues mentioned in this article.
