I'am trying to upgrade my RAM on my macbook pro 2012 mid and I went to ifixit.com and I got the correct tools which was a #00 phillips screw driver and the spudger. For some reason I can only unscrew the four 3.5 mm shouldered phillips #00 screws, and only 1 3.5 mm phillips #00 screw and yesterday I could Unscrew the top left 3.5 mm phillips #00 screw so for some reason some of the screws won't unscrew and the screw driver just spins without the screws turning. I got an email from Ifix it saying "You shouldn't need an additional driver. Check closely for indicators of a stripped screw. That would be the most likely cause. Alternatively it could be a stripped screwdriver head and that would warrant replacing the driver." The screw driver isn't stripped and I don't think the screws are stripped either. If you look at https://www.ifixit.com/Guide/MacBook+Pro+13-Inch+Unibody+Mid+2012+RAM+Replacement/10374 you can see the screw driver I need and then below that all the screws. It just so happens to be that the 3.5 mm screws (orange) don't unscrew or at least 2 doesn't unscrew and the 14.4 mm screws don't unscrew either. The 3.5 mm shouldered ones open up easy but for some reason the 3.5 mm and 14.4 mm don't open up so I doubt that they all happen to be stripped, because why would it be only those type of screws when the other type of screws work? Any Ideas what to do? Thanks to all in advance.