I can't find the update to macOS Catalina.

Hi mihai199,

Thanks for using Apple Support Communities. It sounds like you’re having trouble updating your Mac. I’m happy to help. To start, I suggest making sure your Mac meets the system requirements for macOS Catalina:

macOS Catalina - Technical Specifications

Then, you’ll want to follow the steps below:

How to update the software on your Mac - Apple Support

If that doesn’t help, please respond with additional details, such as the Mac you’re using and the macOS version currently installed.

Have a great day!

See if running these commands in the Terminal helps. Helped a couple people. I never had the problem so I couldn't test them.

sudo softwareupdate -l --all --force --reset-ignored

softwareupdate --reset-ignored