How to block the macOS Catalina update

1. Open Terminal (in the Utilities folder in the Applications Folder)
2. Run sudo /usr/sbin/softwareupdate --ignore "macOS Catalina"
3. Enter your login password if asked, hit Enter and you should get confirmation that “macOS Catalina” updates will be ignored.

1. How do I stop a Mac update in progress?
2. Can you uninstall macOS Catalina?
3. Can I downgrade from Catalina to Mojave?
4. What do I do if my Mac is stuck on the loading screen?
5. How do I quit the installer on my Mac?
6. Is Mojave better than Catalina?
7. Does downgrading macOS delete everything?
8. How do I backup my Mac without time machine?
9. How do I downgrade from Catalina to Mojave without time machine?
10. How do I downgrade from Catalina to Mojave without losing data?
11. Why is my Mac so slow after Catalina update?

How do I stop a Mac update in progress?

If you go to Software Update in System Preferences there should be a way to stop an update. If you move your cursor to the end of the progress bar for an update, an X will appear where you can cancel it.

Can you uninstall macOS Catalina?

As you can see, it is possible to uninstall Catalina if you decide you don't want to continue using it. It's essential, however, that you backup your Mac before you upgrade. And remember, before you backup, clear out the clutter with CleanMyMac X.

Can I downgrade from Catalina to Mojave?

You installed Apple's new MacOS Catalina on your Mac, but you might be having issues with the latest version. Unfortunately, you can't simply revert to Mojave. The downgrade requires wiping your Mac's primary drive and reinstalling MacOS Mojave using an external drive.

What do I do if my Mac is stuck on the loading screen?

How to fix a Mac stuck on the loading screen?

1. Shut the Mac down, usually by pressing the power button.
2. Now press the Shift, Control, Option keys at the same time.
3. Then while still pressing those keys, hold the Power button at the same time for 10 seconds.

How do I quit the installer on my Mac?

Press Cmd-Alt-Esc or go to the Apple menu and choose Force Quit. Select the App Store app and confirm you want to force quit.

Is Mojave better than Catalina?

Mojave is still the best as Catalina drops support for 32-bit apps, meaning you will no longer be able to run legacy apps and drivers for legacy printers and external hardware as well as a useful application like Wine.

Does downgrading macOS delete everything?

No matter which way you downgrade your macOS version, you'll erase everything on your hard drive. To ensure you don't end up missing anything, your best bet is to back up your entire hard drive. You can back up with the built-in Time Machine, although you must be careful if you use this option.

How do I backup my Mac without time machine?

The second method is to manually backup Mac data to external storage devices without Time Machine.
...
Method 2. Manually Back Up Mac without Time Machine

1. Click Finder > Preference > Check Hard disks box under Show these items on the desktop.
2. Open backup disk and create a file folder and name it, for example, 'My Backup'.

How do I downgrade from Catalina to Mojave without time machine?

In the macOS Utilities window, click Disk Utility. Select the hard drive with Catalina on it (Macintosh HD) and select Erase. Give your Mac's hard drive a name, select either Mac OS Extended (Journaled), and then click Erase. Select APFS if downgrading to macOS 10.14 Mojave.

How do I downgrade from Catalina to Mojave without losing data?

If your Mac is shipped with Mojave, you can directly downgrade Catalina to Mojave with the below tips:

1. Restart Mac, hold Command + Option + Shift + R keys to boot into Recovery Mode. ...
2. Click on "Disk Utility", select the disk with Mojave installed, and click "Erase".

Why is my Mac so slow after Catalina update?

If the speed problem you're having is that your Mac takes much longer to startup now that you've installed Catalina, it could be because you have lots of applications that are automatically launching at startup. You can prevent them auto-starting like this: Click on the Apple menu and choose System Preferences.