I have a mid 2010 13 inch Macbook Pro and decided to upgrade the RAM from 4GB to 8GB. I ordered the Corsair 8GB (2x4GB) PC3-10666 DDR3-1333 SO-DIMM 204-Pin Dual Channel Notebook Memory Kit but when I installed the new RAM, Lion would not booth, it would freeze during the booting stage. I was thinking that it may possibly be bad RAM but I was wondering if there are any thoughts/suggestions before I go contacting the seller. Any input? Thank you in advance.