"use audio port for input" support instructions don't work macbook pro 13"
use combination audio port instructions do not work on mac book pro 13" http://support.apple.com/kb/HT3625?viewlocale=en_US&locale=en_US . audio device is never detected on preferences sound box. what else can i do to use "headphones" as input port for garage band, etc. ?
thanks
MacBook Pro (13-inch Mid 2012), OS X Mountain Lion (10.8.4)