Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DID NOT WORK WITH MACBOOK (LATE 2008) OR DESKTOP

I was really looking forward to upgrading the memory on my macbook and matched the specifications for the RAM exactly. I installed the RAM and my macbook would not boot up, I replaced the original RAM and it worked fine. Tried three more time to install, did not work. Tried on my wife's computer would not work. I can only assume the product is defective. I will give them a chance to replace it and try again, if it doesn't work this time, I'm done. I'll bite the bullet and buy from Apple.