The old girl is getting kind of long in the tooth. It's a 2009 24" iMac 2.93 GHz Core 2 Duo, 8 GB Ram [maxed out]. It is currently running Snow Leopard. I've been thinking of upgrading to Mavericks, but I am unsure how the machine would run it. At any rate.. I've been kicking around the idea of replacing the HD with a 480 GB SSD from OWC. I would use the SSD for OS and Apps only and store data on an external drive. My question is.. is this a waste of money? Will I see a boost in performance? I mostly use run photoshop, illustrator, indesign [graphic design]. Thanks!