macOS Catalina - appstoreagent process using excessive memory

Hi diparsons,

Welcome to Apple Support Communities. We understand there's a process of, "appstoreagent" that is using a high percentage of memory in Activity Monitor, which is impacting the performance on your Mac.

It's important to have optimal performance on your computer, and we'd like to help.

If you haven't tried yet, we suggest to restart your Mac in safe mode. This helps to perform a basic check of your startup disk, deletes some system caches and more. Here's an article with more information and the proper steps to take: How to use safe mode on your Mac Once you're in safe mode, please restart your Mac as normal and see if you continue to experience the same behavior.

We look forward to hearing back from you with an update.

Kind regards.

diparsons,

That's wonderful to hear! Thanks for getting back to us and for providing that update. Have a wonderful rest of your day.

Take care.

Uninstalled Xcode, restart, now run's cherry.

I did have an update pending for Xcode in App Store prior to and during the Catalina upgrade, encountered the same issue as the above user @diparsons.