How do I change from Catalina to High Sierra?

Launch the installer, accept the EULA terms and click Continue. Click Agree on the next screen. Choose your disk where you would like to install macOS High Sierra if it’s different than your current operating system drive (note that down somewhere) then click Install.

How do I get back to High Sierra?

Restart the Mac and hold the Option Key. From the Select boot disk window, choose the macOS High Sierra installer. The process of installing High Sierra will begin. Mac will restart once the installation is over.

How do I change my Mac to High Sierra?

To update your Mac, open the System Preferences app or the “About This Mac” menu. If your Mac is still running macOS High Sierra or earlier, you’ll need to go through the App Store to update it. You should update your Mac whenever you can, as every update comes with new features and security patches.

Is High Sierra better than Catalina?

If you’re looking for stability, Catalina is better than either of the latest macOS versions. If you’re running 32-bit applications, High Sierra is a good choice. However, if you’re more concerned about security, Mojave is a safer bet.