It is time, I think, to replace my 1,1 Mac Pro as I can only upgrade to Lion the way it sits. I am looking at the Apple iMac ME088LL/A 27-Inch Desktop. It ships for $2499.00 from Amazon. Photography has been my living for 40 some years and the Mac Pro isn't needed any longer as I am not doing anywhere near the post processing I was doing in the mid 2000's. That plus the fact that I don't want to buy new chips and other items just to upgrade to Yosemite. I have discussed this on the forum and have made a pretty firm decision to get this Mac. Is there anything I need to know concerning what to look for as to peculiarities or problems that may occur with this if I pull the trigger on this? Thanks for any consideration.