Today Apple released new firmware software for the Mac.
These are the models you are looking for:
- Mac mini EFI Firmware Update 1.6 (4.08 MB)
- MacBook Air EFI Firmware Update 2.4 (4.06 MB)
- iMac EFI Firmware Update 1.9 (3.77 MB)
- MacBook Pro EFI Firmware Update 2.7 (4.24 MB)
This update improves the reliability of booting from the network, addresses an issue that can prevent HDCP authentication after a reboot, and resolves an issue with boot device selection when a USB storage device is hot-plugged.