With so many brands advising against upgrading to macOS Catalina, the Catalina nag screen is going to get boring. Rather than disable the Software Update app altogether, we have discovered a way to block macOS Mojave from trying to upgrade to Catalina. We show you how…
How To Block macOS Catalina From Showing Up In Software Update
You will need to use Terminal. Please be very careful when using Terminal as a mistake can cause havoc on your computer, so our advice is if you are not comfortable using Terminal then don’t try this. If you are happy to proceed you do it at your own risk.
To prevent Apple’s Software Update from reminding you that its time to upgrade to macOS Catalina then we have found a way using Terminal to block it from appearing.
Open Terminal (It’s in the Utilities folder in the Applications Folder)
Type the following into Terminal…
sudo /usr/sbin/softwareupdate --ignore "macOS Catalina"
You will then be asked for your login password.
Type that in. Don’t worry that Terminal will not display your password.
Hit Enter and you should get confirmation that “macOS Catalina” updates will be ignored.
When you want to undo it at the point that you are ready to update to macOS Catalina then go into Terminal and use…
sudo /sbin/softwareupdate --reset-ignored
to remove the block.