Size of phillips for adding ram to an imac 20"

OWC (Other World Computing) may have instructions on how to upgrade the RAM in your iMac. The instructions usually include the size of phillips screwdriver that you need. I have a new 24" Aluminum iMac and I bought a size 0 phillips screwdriver to open the RAM door.

I used a #0 or #1. I can't remember but the problem is that those screw heads are very shallow so the screw driver tents to bottom out making it tougher than it should be. Just be sure to push down on your screwdriver fairly hard while you start to turn and take it slowely. You don't want to round out the screws!

And, once the screws get started, you won't know that they are completely out because they "float" on the RAM door. I used a paperclip and bent a small 90 degree hook into one end. Then put it though one of the ventilation holes in the RAM door to pull the door off.

Yeah...just a regular driver will do. Just put some shoulder to it before you start to turn. Leftie loosie....😀