Hi, a friend of mine has this: iMac 2010 OSX10.4.11, Intel 2GHz Intel Core 2 Duo, 1 GO 667 MHz DDR2 SDRAM. Of course there's a lot her computer cannot do and does not do. What would be the easiest and fastest way to upgrade her machine to at least Maverick. If even Maverick would stutter, Mountain Lion would be fine considering she does mostly e-mail, Safari, Facebook and Word. Can we by any chance think about Yosemite? Thanks for your hints Racineur TITLE: "LATEST"