Well, I was wanting to use the MacOS Mail App yesterday and ran into quite an issue. While loading it for the first time it stalled on loading mail and had to be force quit. After that it would not reload or even start up. The task bar shows up but all it gets is a beach ball, no matter how long it runs for. I have looked in the App Store to see if I could re-download and reinstall it, but I cannot find it anywhere, (I guess it only comes with the OS). I am hesitant to try and reinstall it via Time Machine, as it would affect more than just the Mail App. Any suggestions out there?