Hi guys, I live in Qatar and they don't have the type of RAM I need here, so I'll have to order online. I currently have 2GB+2GB=4GB and my computer lags when I use weighty software. But if I order online, there's no trial or resend possible, so I have to be absolutely, super duper 100% positive it'll work. These are my specs: Bought in mid-2010. Processor 2.4 GHz Intel Core 2 Duo, RAM-type: 8500S. Memory 4 GB 1067 MHz DDR3, Graphics NVIDIA GeForce 320M 256 MB Serial Number WQ026D2WATM Software OS X 10.8.5 (12F45) I'd love 16GB, but it's too risky as I've read some work, some don't for my model. So I'll settle for 8GB. Please help, I'm no savant hardware wise so would appreciate a reliable opinion here. Thanks !!