Hi all, I have a rudimentary question.... I have a 2011 iMac 2.7 GHz Intel Core i5 with 4GB 1333 MHz DDR3 with 500 GB HHD (about 250 GB used). My Mac is very slow to open iPhoto and/or multiple programs. Lots of lag and spinning color wheels hang out on the screen. I always migrate my old mac to my new one as I don't want to lose important files. Should this cause a problem? Will purchasing and installing more RAM solve my problem? I am running 10.8.3. Thank you for your help.