So i'm getting RAM tomarow and I have a small screw driver that is barely magnetic, as in it can only hold the screws used to take out the small screws that you need to take out to get to the RAM. BEfore i knew that it was this magnetic i used it to open a screw on the furthest side of the mac, which is far from the HD and nothing happened. I'm just wondering if a magnetic of such low power would effect my mac...i don't rly think so