How to fix / Reset App Store app on Mac OSX - El Capitan Newly upgraded to Latest released OS X - El Capitan (10.11.5). Now when I open App Store app, the spinning wheel to right of &lt; > buttons on upper left side continues to spin with no content visible below on any tab button. Originally, I saw that 1-update was available. I read an earlier note to use Activity Monitor and kill processes related to App Store. Saw 2 that had long process times (storeassetd, storedownloadd). Plus now see App Store Web Content in "(not responding state). How do I fix this???
Go to Finder and press ⌘ + Shift + G;
Locate ~/Library/Caches/com.apple.appstore and delete com.apple.appstore which are cache files;
Then press again those commands and go /private/var/folders, open each folder and each subfolder until you find com.apple.appstore and delete this folder;
Restart your Mac.