Feb 01, 2021 If you're using one of these computers with OS X Mavericks or later, you can install macOS Catalina.Your Mac also needs at least 4GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier. macOS Big Sur elevates the world's most advanced desktop operating system to a new level of power and beauty. Experience Mac to the fullest with a refined new design. Enjoy the biggest Safari update ever. Discover new features for Maps and Messages. And get even more transparency around your privacy.
Hey there shenvee,
Thanks for reaching out to Apple Support Communities. I understand you’re having issues downloading apps on your Mac after updating to macOS Catalina. You’ve done some great troubleshooting so far and I’ll be happy to help with this.
Have you tried updating apps in safe mode or a test user account? If not, try both of these to isolate and possibly resolve this issue:
If that doesn’t help, trying reinstalling macOS using the steps from the following link to help you keep your files and user settings intact:
Macos Catalina Apple Store Update
Even though this should not affect your data, it’s always a good idea to back up your Mac before taking these steps:
Macos Catalina App Store Install
Let us know if this helps.
Macos Catalina App Store Won't Open
Best wishes.
Macos Catalina App Store Link
Oct 10, 2019 6:13 PM