Catalina update : Wont open App Store Anyone else???

I had the exact same problem and found an answer that worked for me here:

https://www.reddit.com/r/MacOS/comments/enmnk6/app_store_completely_not_working_for_macos/

I opened up the Keychain Access app, then Preferences, then Reset My Default Keychains.

As soon as I did this it immediately worked, don't understand why or why this isn't anywhere on the Apple support forums.

Restart in the Recovery Partition (hold down Command + R on startup) and re-install Mac OS. This will fill in any missing or damaged areas of Mac OS.

This will not erase any data however it is always wise to have at least 1 backup of your entire system prior to the install as insurance.

I had the exact same problem and found an answer that worked for me here:

https://www.reddit.com/r/MacOS/comments/enmnk6/app_store_completely_not_working_for_macos/

I opened up the Keychain Access app, then Preferences, then Reset My Default Keychains.

As soon as I did this it immediately worked, don't understand why or why this isn't anywhere on the Apple support forums. The suggestions on these Apple support forums seem to be more about getting "points" than actually solving problems.

Was running the same issue, tried everything.

The life-saver was: Go to network preferences -> Location -> Edit Locations. And just add some dummy location (no specific config) and choose the location for your network.

I had this problem when I updated to Catalina. This fix worked for me..

The solution to this was to go to Keychain Access -> Preferences -> Reset my default Keychains

Although resinstalling MacOS hasn't helped, you can still try rebooting in Safe Mode (restart your Mac with the Shift button pressed till you get to the login screen). This will delete all unnecessary files and attempt to repair any glitch that you may be having. Have you tried that?

It talks of the presence of orphan files, so a reboot in safe mode may help. Try that.

Since the Catalina update, although the App Store on my Mac opens and gets things done, I see that the app updates don't happen automatically. I have to manually update them when updates are available. Also, an update shows up much later than when released. Just today an app update showed up that was released on 7th Feb. So it appears to be some glitch with Catalina.

I had the exact same problem and found an answer that worked for me here:

https://www.reddit.com/r/MacOS/comments/enmnk6/app_store_completely_not_working_for_macos/

I opened up the Keychain Access app, then Preferences, then Reset My Default Keychains.

As soon as I did this it immediately worked, don't understand why or why this isn't anywhere on the Apple support forums.

Please read my last post. I am asking how you are attempting to open the Mac App Store:

1. Are you clicking on the App Store icon in the Dock? OR
2. Are you navigating to the Applications folder and clicking on the App Store icon? OR
3. Navigating to LaunchPad and clicking on the App Store icone OR
4. Opening Spotlight and typing App Store? OR
5. Clicking the Apple symbol in the upper left of the display and clicking opening the App Store from there? OR
6. Other (please describe in detail)

Thanks!

Yes!! Thank you friend. Resetting the keychain totally fixed this problem for me as well. I was going nuts!!

Please navigate to the Mac App Store or navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it. This report will help us get a good idea what has been installed on your system and help us be able to diagnose what may be wrong.

When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again. 

For instructions on how to download your EtreCheck report and attach it to your reply to this message please click https://discussions.apple.com/docs/DOC-250000211

Thanks resetting the Keychain app really worked😃

How are you attempting to launch the app? Do you use your Dock, go to the Applications folder, use LaunchPad, use Spotlight...etc?

yes! this happened exactly to me as well. i installed catalina yesterday. can't open apps store. then apple care help hotline guided me in re-installing the os catalina in exactly the same way mentioned above tonight and still. no app store

Tried that. No go.