Hello. I have had my iMac mid 2010 for less than a year and have only used one OS version which is 10.6 Curious for those of you who Play WOW or any game that can be a bit of a system hog if its worth me upgrading? I have a 3.2 core i3 4g ram 1tb drive. 5670 AMD at 512. My concern is this. In my old days of building Pee C's every now and then when a new OS or Version came out there could be issues either GPU, CPU, or HD wise with some games. I am no expert on Mac OS so looking for input. Will I have that issue, or see any loss or is a upgrade to the Mac OS usually a boost to all aspects? I also run SC2 and Aperture 3 and its very important to me not to have those slow down. Am I worried about nothing, or can you run into issues upgrading Mac OS? Thanks all.