I have a Macmini 4,1. I tried to use plug headset with mic for skype call, but it doesn't work.

I can hear the voice from the other end, but my voice can't be heard on the other end. I tried with two or three headsets, but results the same.

Then, a friend asked me to try using USB headset, I brought it from one neighbour and now it works fine.why?

Is it a problem of my macmini, or all macmini would behave like this?

Referring to the answer, I have to decide to buy a new USB headset or not.

  • What plug does the headset have?
    – mmmmmm
    Mar 28, 2013 at 13:41
  • 3.5 mm plug(two plugs red and green for mike and speeker) we can see the holes in the macmini that fits it Mar 28, 2013 at 13:46

3 Answers 3


Here are the specs for this mini according to Wikipedia. Note that this Mac (and most Macs I'm familiar with) has an audio line-in which is a high-level input, but no mic-in (low level). That means you'll need an external microphone amplifier between the mic and the line-in input. The USB mic is doing all of that for you - amplifying the mic and converting the audio signal to digital.


When you plug the cable in for the microphone, you may also need to enable this input in System Preferences. Go to System Preferences > Sound > Input and make sure your headset is listed and selected here.

I've found that USB audio devices typically auto-select themselves when plugged in, but devices plugged into the audio jacks don't normally auto-select.

If this doesn't work for you, you may need to get the Mac mini looked at by a tech, as it could be indicative of an actual hardware problem.

  • From the OP's comment, I suspect he's got a headset with separate jacks for the headphones and the mic, and is trying to plug the mic jack into the mini's audio line-in, which probably won't work, or will at least require him to use line-in and not microphone as his audio source...
    – Dan J
    Mar 28, 2013 at 16:25

New Mac Minis have "Mic In" ports, but you have to use the 4-conductor phone-type plug - the mic in is one of the contacts on the headphone-out plug.

So in this case you'd need an adapter (like what you'd use to use the headset with an iPhone).

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