So, for the first time ever, my 2009 27 iMac beach balled/got hung up right after I pressed enter after entering my PW. 2009 27" i7 2.8Ghz 16GB RAM Crucial MX100 256GB SSD Radeon HD 4850 Running Mavericks 10.9.5, and has been flawless besides this. I'm curious if anyone else has had anything like this happen, regardless of their model of Mac? Anyone have any ideas as to why this may have happened? This only happened ONCE - will update if it happens again. I had to hard reboot it (power it off holding down the power button, then turn it back on). Never like to do that.