MacBook Pro Retina EFI Update Released
Apple has released an EFI Update for the Retina Display MacBook Pro.
MacBook Pro Retina EFI Update 1.0:
This update is recommended for MacBook Pro with Retina display (mid 2012) models.
This update resolves an issue which can cause the system to hang during heavy processor loads, and resolves an issue where NetBoot does not function properly when using an Ethernet adapter.
You can get the update by selecting Software Update from the Apple Menu at the top left of your screen.