Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
If you plug an external HD into an iMac, it should just recognize it and you're good to go. If not, there is something wrong with the HD, at least in my experience. I just had to get a new one at home as my 7 year old one had it's power supply go. I got the new one, took the drive out of the old one, hooked it up to an old external PS I had, and it was instantly recognized by the new iMac. Pretty easy stuff.Steve
Just got back from New Haven Apple store, wow what an experience this place was! It is dead center of Yale so you can imagine what the crowd was like and busier than star bucks right next door was. Yet the second we walked in we had an associate helping us. Bought the IMAC 21.5, upgraded to 2.7Ghz 1TB drive and 8 gig RAM plus the graphic card. Bought Fusion right there as well! All purchased and the guy says want to set it up quick, huh? I am like how liong will that take, thinking hour plus, nope he said ten minutes tops. Sure enough un packed up and running in less than ten, set up my IMAP emails in 10 seconds, set up my Icloud which i already have through my Ipad. Meanshile as pretty as the Macs are in the store my eyes were about to come out of my head with the women from Yale walking around wow!
http://eshop.macsales.com/item/Other%20World%20Computing/1333DDR3S16P/?utm_source=google&utm_medium=shoppingengine&utm_campaign=googlebase&gclid=CPPujZbv-LECFUXf4AodoSoAsw16 Gig memory for new iMac