Mac OSX has loads of issues after upgrade
I upgraded my OSX to mountain lion 10.8.3, and after 2 days it is completely crippled. I will try to describe my problem as there are loads of symptoms.
My Activity monitor shows UserEventAgent, SystemUIServer, and loginwindow eating 2GB of memory each. Plus I installed a new App called Onyx to try to resolve issue, and even that app is not working eating 3gb of RAM. My mac is crippled, every app just crashes, I can't even successfully shut it down because it so overloaded. Oh, and the worst part, the Upgrade ruined my Time Machine Backup, because after upgrade it started backing up and crashed in the middle of it showing black screen of death.
The best (or worst) part of this horror story is, is that I tried reinstalling my OSX by doing Cmd-R. Everything went smoothly to a point where I choose the HD to install to, and it only listed a recovery drive, the main drive wasn't even on the list. What this means, is that I'm deep in the water, and I have no idea how to bring my mac back to healthy state.
iMac, OS X Mountain Lion (10.8.3)