I have a Mid 2010 mac mini, which supports 8GB ram. Whenever I put 8gb in the computer, it wont boot. More specifically, it just beeps. I've tried the following: The error occurs when there are 2 slots of memory in the computer. I take the higher level memory chip out, and it boots fine. I've also swapped this chip with my other 4gb chip, and that works. Only issue is that it wont accept 2 chips at once. Through my trial/error, I've determined both chips work. Is my Mac faulty or am I doing something wrong? Warranty is expired so any advice would be appreciated.