Mac OS X is booting in EFI-Boot-Mode
After 6 month of working, our MacBook Pro didn't boot suddenly. Nevertheless we have a 3 year guarantee and send it to the reseller for repair. They replaced the mainboard and send it back to,us.
But now, it boots every time in an EFI-Boot-Mode!
Also, it will not show any serial number of the MacBook Pro. Instead in the System Profiler we can read „Not available“.
How can we hide the EFI-Boot-Mode?
Is it correct that there is no serial number available after changing the mainboard?
Thanks for answering.
MacBook Pro (15-inch Early 2011), Mac OS X (10.7.4), Mainboard has changed