Hello Mac Community, I have a quick couple of questions with regards to running El Capitan on an older machine. I currently have an early '09 iMac (see specs below). iMac (24-inch, Early 2009) 2.93 GHz Intel Core 2 Duo 4 GB 1067 MHz DDR3 NVIDIA GeForce GT 120 256 MB I have began using my iMac more and more now with my photography hobby growing. However when editing pictures and photographs in Pixelmator/iPhoto I notice a HUGE drop in performance. Editing, adjusting and simply saving can result in minutes of the spinning beach ball. Even turning my computer on now takes a good 2-3 minutes to fully boot up (even from a cold boot). This never really bothered me at first until I saw how my partners brand new Macbook ran and how it booted up in seconds! I cannot afford a brand new machine at this point and was looking for an alternative to improve the speed of my iMac and El Capitan without breaking the bank. A friend of mine recommended a RAM upgrade, he said I should notice a rather large difference upgrading to 8GB over my current 4GB of RAM - can anyone else confirm this? If so does anyone have any respectable websites which sell RAM for Mac at a reasonable price? If anyone has any ideas on how to improve the speed of my Mac either via software or hardware then I would be very grateful. Many Thanks!