How to boot from USB when option key is broken?

Mavec

macrumors newbie
Original poster
Aug 7, 2011
8
0
I have a 2011 MBA and am trying to boot into a bootable USB drive, running Mountain Lion. The problem is that the computer was dropped a long time ago and most keys do not work, including the Option key. I plugged in an external keyboard and which has an ALT key to substitute for Option and in Mac OS works as a replacement for Option with no issue. However, while holding down the ALT key on the external keyboard to boot up as I would with Option if the keyboard were not broken, it does not seem to have an effect and goes right into Mac OS.

I am wondering if there is a way to choose the USB port as the default to boot into or another way I can boot into the USB port? Thanks...
 

keysofanxiety

macrumors G3
Nov 23, 2011
9,467
24,214
On startup, try hold Windows key + R on the external keyboard instead; does that boot into OS X Utilities? If you're using an Apple keyboard, hold CMD + R. If this does nothing, try to hold CMD+ALT+R / WIN key+ALT+R on startup for Internet Recovery.

Any luck?