Hey everyone, I own a late 09 iMac 27", had 8GB of ram (4gb apple and 4gb owc). I don't have warranty anymore, and as of lately my Mac has been acting wierd. I'm not sure if its related to memory issues, but once in a while for the past 2 months, it acts like its shutting down (blue screen) but then the desktop comes back up with all my apps closed out... as if I had just rebooted. It doesn't physically reboot tho. I'm a web developer so I have lots of apps open, firefox is the main one and due to its memory leaks sometimes hovers around 2GB of ram being used. Most of the time my free ram is under 500MB, but inactive is always typically 1.5GB + Anyone know what it can possibly be?