How to Uninstall and Reinstall Media Composer
1. Open Applications > Media Composer
2. Save copies of your Avid Projects, Avid Attic, and Avid Users folders to your desktop
3. If you have any AVX plugins in the AVX plugins folder, save them too. You can also save any Marquee titles you may have.
4. Open Applications > Avid Uninstallers. Run the Media Composer Uninstaller
5. When that’s done, quit the installer application and open Applications.
6. Delete the Media Composer folder if it’s still there. Also delete any Dongle folders that may exist in Mac HD > Applications > Utilities
7. Open Mac HD > Library > Application Support and delete the Avid folder and Digi folder if they’re there
8. Open Mac HD > System > Library > Extensions and delete anything that starts with Avid
9. Open Mac HD > Applications > Utilities > Disk Utility and select First Aid
10. Verify Permissions and then Repair Permissions on the Mac HD. I would do this twice.
11. Restart the computer
12. You can now run the installer and install Avid Media Composer