Hey Folks, Just wanted to share my experience. Seen a lot of messages online saying that it works for other people. Just tried this on mine (Early 2008 20-inch, A1224), and it craps out with 8GB. (More specifically, it boots extremely slowly – on the order of 10 minutes – and I can't get past the login screen.) FYI, the RAM I used was Komputerbay RAM purchased off Amazon, 800MHz unbuffered non-ecc per Apple's memory specification page. 6GB works fine.