Firmware update fixes Boot Camp issue on mid 2013 MacBook Air

Apple on Thursday posted EFI Firmware Update 2.7, an update aimed specifically at new MacBook Air models made since mid-2013 (that is, the ones equipped with "Haswell" processors).

This update addresses an issue which may cause a black screen to appear when installing Windows 7 or Windows 8 using Boot Camp Assistant if both an external optical drive and USB thumb drive are connected to the system. This update also ensures that the system will boot by default into OS X after installation of Windows 8.