I feel stupid right now! haha. I can't believe I didn't check everything before buying, and I'll be traveling out of the U.S. in one week! I have a MacBook Pro Mid 2012 with 4gb of RAM. I searched on eBay for RAM, and bought the cheapest Crucial RAM. It's PC3-10600 DDR3 1333 MHz type RAM, and I just noticed the one for mine says it uses PC3-12800 DDR3 1600 MHz type RAM. Will the RAM I bought work with my MacBook Pro without any problems or will it have problems? If it will work where do I buy the screws for to replace the RAM? I don't have a screw driver to open the MacBook Pro. Thank you!