How to use the headphone jack as a audio input
i have the newest macbook pro (summer 2012) and am trying to use the headphone port as a audio input port. I have seen how it is done on older mac pros by switching the output to an inout via system prefrences but that technique doesn't seem to work on this one. Is there any way to convert it to a input?
MacBook Pro (13-inch, Mid 2012), Mac OS X (10.7.4)