21.5-inch, Late 2009 iMac Memory 12 GB 1067 MHz DDR3 Graphics NVIDIA GeForce 9400 256 MB Software OS X 10.8.5 (12F45) I was thinking of upgrading from Mountain Lion, because around October I started getting recurring Safari crash issues, even after using time Machine to revert back to clean install of Mountain Lion. I have yet to get a diagnosis of the crashes on the apple support board, but I'm still hopeful. In the meantime, I'm thinking maybe I just need to finally upgrade the OS. I figured I wouldn't push it since I have an older iMac, but I am curious if it would resolve the Safari issues. Problem is, if I were hesitant before to go to Maverick, I am even more hesitant to leap to Yosemite. Is Maverick still available?* Can my system handle Yosemite?* *Right now I have reverted back to clean install of Mountain Lion (well, actually it reverts back to a saved clean install of Snow Leopard that was immediately upgraded to Mountain Lion). I haven't even added Adobe Flash back yet as I try to figure out the Safari issue. But I hope to run: Office 2011 (namely Excel and Word). Mental Case flashcard app ScanSnap scanner Spotify possibly Anki presumably MS Silverlight for Netflix, though I can get by without Netflix That's all that comes to mind that I'd be using.