Works great in late 2008-2009 Macbook: Crucial 8GB Kit (4GBx2) DDR3 1066 MT/s (PC3-8500) CL7 SODIMM 204-Pin Notebook Memory Modules

They said it couldn't be done, and they were wrong. I found instructions on the web to confirm my EFI firmware was up to date, and then just installed the DIMMs. This kit works great in my late-2008 Macbook Pro 15" and 8GB memory makes a huge differences for my multitasking.

The Crucial Memory works great - no flaws, errors, or anything but extremely fast performance. I wanted this kit because I use my iMac to do a lot of work with videos and to run a Windows 7 virtual machine. Everything runs a lot faster. The Windows 7 machine performs wonderfully with the 4GB I've assigned to it; it boots quicker and loads applications as fast as it would from a machine running Win7 natively.

Corsair Vengeance 8 GB ( 2 x 4 GB ) DDR3 1600 MHz (PC3 12800) 240-Pin DDR3 Memory Kit for Core i3, i5, i7

Don't get me wrong, this Corsair Vengeance 8 GB is an AMAZING product. And if you can get it on sale then it's even better. But it's pretty expensive, and for MOST people, you won't even need 8GB. You should only get more than 4GB on a single computer if you're trying for a gaming oriented set up.

To add to that, if you have a 32-bit operating system, you can't even use this product to its maximum potential. 32-bit operating systems can only properly use a little less than 4GB. Vengeance memory is designed specifically for the latest CPUs.