Hello, I am a first time Mac user. Bought a new 13.3'' macbook pro a few days back. Got the 2X 4GB GSKILL memory from newegg. The system wouldn't boot properly with that memory. The spinning wheel got stuck upon booting. I wounder the memory is compatible or not. This is the memory I got http://www.newegg.com/Product/Product.aspx?Item=N82E16820231295 Cas Latency:9 Timing:9-9-9-24 Voltage:1.5V ECC:No Buffered/Registered:Unbuffered If it is incompatible, I will return it and get a compatible one. Please recommend a good 8GB memory kit that many had success with. Would appreciate a response and recommendation.