Ever since upgrading my Mac Mini to Mavericks I haven't been able to use Mail. I would stay open for a few seconds then crash. I updated to 10.9.1 and got a little pop up it was rebuilding a data base or something, then opened, updated my mail and promptly crashed. Now I get about 5 seconds of use before it crashes. So by 10.9.20 I'll be able to use mail I guess. Is reinstalling the OS the only way to reinstall Mail?