External mic input on the rMBP?

The 3.5 headphone jack is both input/output.

kronosqq said:

Hey, I was wondering whether anybody knows how to get input from an external mic (using the 3.5 mm) on the rMBP. I know that it was possible on the MacBook Air in the past but I can't seem to get it to work on here. Thanks.

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The headphone jack supports an monaural microphone input. Here's the only schematic I could find in a quick search. It shows a breakout adapter which breaks out the microphone input onto a separate phone jack.

kronosqq said:

Well I know that the port itself is both input and output, the problem is on the software end, nothing I plug in shows up and there doesn't appear to be any way to add inputs.

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what software are you using?

I don't think you can plug a regular mono mic directly into that Jack. for example, on my iPad I need to plug a mic into an adapter that has the specialized for four ring plug and then it works. example, Irig mic, which has a specialized jack for headphones that plugs into the microphone as well, has one of those four ring jacks that needs to be plugged into the iPad. in other words, like I said, I don't think you can just plug in regular microphone into that Jack, I could be wrong but I think this is the case.