Answer to: How do I reset the open firmware password on my Mac?I went nuts trying everything to get the "reset RAM" trick to work on My 2009 2.66 MacBook Pro, and partly by luck, I finally got the EFI PW to reset. I had to remove the bottom RAM Piece, and boot it with just only the top positioned RAM in it. . Just removing the top RAM piece was NOT working. Also if you have only one RAM piece, and dont want to buy another, try repositioning the RAM, into the other RAM position to reset the EFI. I hope my comments helps someone as much as it would have helped me 2 weeks ago. BEST !