I am waiting for a new iMac i5 Retina to get to my shop this week but wanted to try CC in the meantime after which I will switch everything to the iMac and Yosemite. Now running OS 10.6.8 on my '07 Mac Pro. Will this work or am I spinning my wheels. I do a lot of work that isn't darkroom with CS3 and am not using Lightroom as of today but am thinking of getting it when I get the new machine. Semi-retired Photographer and wanting to stretch my wings a bit more into the creative aspects instead of the day to day. Thank you for any response.