I recently installed Elementary on my 2009 MacBook Pro. Every time I start up and log in the system becomes unresponsive within minutes (maybe even within seconds.) The mouse continues to work and I can move the cursor, but not click anything. After several minutes one of the actions I have tried happens then it hangs again. For example, a new tab opens in Epiphany, but it is otherwise unresponsive. Eventually I have to shut it down (hard reboot, or get to a Terminal and shutdown more gracefully - I think that was CTRL+ALT+F1 that worked, although I tried lots of shortcut combinations and one of them seemed to work but only after several minutes.) It happens even if only Epiphany is running. One time I noticed blue dots underneath a couple of the applications in the dock, but a red dot under the appcenter one. That wasn't true every time it happened.
The system is not usable as it is, I would like to know any troubleshooting tips anyone can give me as I need to figure out whether this is fixable, or a hardware problem with the mbp (I had a suspicion of something not right with the hardware before install because it didn't work with later versions of MAC OS, but it ran OS X Snow Leopard fine.)