@Gabriel I tried the tutorial on http://pubmem.wordpress.com/2011/04/09/flash-efi-firmware-update-manually-on-a-macbook-51/ . I'm now going through another installation to see what really solved the problem!
@Gabriel I tried the tutorial on http:// pubmem. wordpress. com/2011/ 04/09/flash- efi-firmware- update- manually- on-a-macbook- 51/ .
I'm now going through another installation to see what really solved the problem!