I downloaded the new EFI firmware and my computer is SO choppy...the scrolling, the typing, loading of new pages or even pages that are open an d I looked at 3 minutes ago have to "reload" when I click on the tab. You tube videos are horribly choppy.
I just lowered my resolution on the screen, I've done disc permissions, I've ran troubleshooting and reset the SMC (?) power cord unplug and plugging....
HELP! I have a 6 month old iMac 12.1 with OS Lion 10.7.3...