My garageband worked fine till I tried to install some Jam Packs because the info side panel/master track/browse/jam pack were all empty (?) ...
I tried re-installing but the installers always crashed during the installation, I force quit the installer the last time and tried to restart. I couldnt restart, I had to pull the plug.
When I restarted, I launched Garageband and it came up with 3 annoying 'registry' errors and tried to endlessly initialise. Then I just clicked on the application icon and it went straight to garageband. App seemed to work fine.
I just hate annoying error messages, so I looked into fixing the problem. I discovered (from previous posts here) removing the AmpliTube 3 plug ins inside the Library/audio/plug-ins/components and VST did the job nicley.
Back to my original problem ... do I have all jam packs?
I just got mainstage for $30 and the additional content are the Jampacks ... problem solved ... I hope!