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Like title, I'm using a Boya M1 lavalier mic with a 3.5 mm plug. When I put it into the jack (that is the same of the headphones), my audio go mute, because computer thinks I'm using a headphone. Luckily, the mic works as expected, but I can not hear any audio. So if I am in a conference, I cannot hear them.

Is there is a software solution? If not, what hardware solution could I use?

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  • Check your sound system prefereces and set ouput to internal speakers.
    – Solar Mike
    Commented May 26, 2020 at 6:12
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    Hehehe. That's the real problem, when I put mic's jack in it only show me the "headphone" as audio output. :(
    – BAD_SEED
    Commented May 26, 2020 at 6:19
  • Please edit your question to clarify this. It's most likely a hardware issue though.
    – nohillside ♦
    Commented May 26, 2020 at 6:48

2 Answers 2

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You do not have a microphone jack. You plugged your microphone in the headphone jack. This is why you can not select internal speakers.

Try one of these adaptors:

USB Type A:

https://www.amazon.com/customerpicks/Explore-usb-adapters-for-microphone/49a722acca2e7546619b

USB Type C:

https://www.amazon.com/CableCreation-External-Headphone-Microphone-Compatible/dp/B075YFDJ4Q

https://www.amazon.com/Headphone-Microphone-Plantronics-Sennheiser-Compatible/dp/B07KPLDJ18

Or get a USB microphone and skip the adaptor.

https://www.amazon.com/usb-microphone/s?k=usb+microphone

https://www.amazon.com/usb-c-microphone/s?k=usb-c+microphone

Perhaps the jack is for a headset (combination microphone/headphone).

There is this question: How to use a wired headphone AND a mic at the same time on the Macbook Pro Retina?. The answer would suggest the jack would accept a plug with two rings. This would allow the jack to be used for a mono microphone and stereo headphones. If this is your arrangement, then the you still would need a USB solution since using the jack would not allow the internal speakers to be used.

Although, you have to wonder. If you used the microphone jack and left the headphone jack unused of an adaptor, like the one shown below, then could the internal speakers be accessed? My guess is probably not.

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There are two solutions:

  • a simple headset splitter. You can pick these up pretty much any store that sells cell phone and computer accessories
  • USB DAC. This gives you a digital audio input/output device connected to USB.

The port on your Mac is a combo headphone and microphone. When you plug in a device, it physically trips a switch that turns off your internal microphone and speakers. This is why you can no longer see the internal microphone or speakers are input/output sources.

I personally prefer the USB DAC because it's totally separate and you can now use a combination of input and output devices. For instance you can use the Boya M1 and the internal speakers. You can use the internal Mic and external speakers. I use my DAC for sending quality audio to my Bose while system sounds remain on the internal speakers.

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  • DAC means digital to analog. A microphone would require a analog to digital converter. Do you know for a fact that an adaptor plugged into the 3.5 mm jack would allow the internal speakers to be used?
    – David Anderson
    Commented May 26, 2020 at 13:00
  • The DAC that I linked to and personally use does in fact have both analog input and output. Did you check it? Because the question is literally about accepting analog input to USB.
    – Allan
    Commented May 26, 2020 at 13:04

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