Hi I have a late 2009 model iMac. The 27 inch screen is BEAUTIFUL and the case is in perfect condition, but unfortunately I am not able to upgrade the OS, and I'd like a much faster CPU. Is it possible to replace my entire motherboard with a current one? If so, can you please guide me to a list of motherboards that might work? Lastly, is this something I need to have done at the Apple store, or could it be done at home by carefully following the directions? Specs on my iMac are listed below: Model Name: iMac Model Identifier: iMac10,1 Processor Name: Intel Core 2 Duo Processor Speed: 3.06 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache: 3 MB Memory: 16 GB Bus Speed: 1.07 GHz Boot ROM Version: IM101.00CC.B00 3.06 GHz Core 2 Duo (E7600) Intro Date: October 20, 2009 Disc Date: July 27, 2010 Order No: MB952LL/A Model No: A1312 (EMC 2309) Subfamily: Late 2009 Model ID: iMac10,1 Std RAM: 4 GB Std VRAM: 256 MB Std Storage: 1 TB (7200 RPM) Std Optical: 8X DL "SuperDrive"