How to Set Up an External Microphone on Your Mac

If you want to record music or spoken word on your Mac, you’ll want a high-quality mic. You can get a microphone in dozens of styles. The most popular are headset mics (often called “gaming headsets”), USB microphones, and standard XLR microphones that connect through a digital pre-amplifier.

In this tutorial we will show you how you can set up an external microphone on macOS.

Connect the microphone


Depending on the type of microphone you have, it will connect to your Mac in different ways. Regardless, all connections lead to the same place: the USB port.

The easiest type of microphone to connect to a computer is a USB mic. You simply plug the mic’s USB cable into any open USB port. These mics have a small pre-amplifier chip built into their chassis, allowing them to take in audio and output a digital signal.

Headset microphones that are compatible with macOS will connect over USB or the headphone jack. Either way, it’s a plug-and-play operation. There should be no configuration required to get the microphone to pick up audio. Just make sure you select the microphone as your input (see below) before using it.


The more standard microphone connector is called XLR. This three-pin circular connector takes an XLR cable. Observant users will notice that computers do not have XLR ports. That’s what you need a USB pre-amplifier for.


The pre-amplifier, or “preamp,” is an outboard USB device that can accept an XLR connection. It also powers the microphone, if the microphone uses “phantom power,” and converts the mic’s analog signal to digital. Preamps, also known as audio interfaces, can range widely in price and quality. The Focusrite Scarlett line is popular, inexpensive, and effective.

Connect the preamp to your Mac through the USB port. Typically, the device will connect with a “printer style” USB 2.0 Type B connector. Plug that into your preamp, then plug the other end of the cable into your Mac.

Some audio interfaces also connect via Thunderbolt. These interfaces function no differently from the USB-style audio interfaces. They just use a different connection protocol and connector style.

Configuring the audio interface

Once you have all your devices connected and turned on, it’s time to configure the audio interface. While Windows requires drivers for audio interfaces, macOS typically does not require a driver. It’s simply plug and play! That makes your life a lot easier, but you’ll likely still need to flip some switches to set things up the way you want.

Open the “Sound” preference pane in System Preferences.


Within that preference pane, you’ll see two tabs: “Input” and “Output.” Click on the “Input” tab and find your microphone or audio interface, and set it as the system input. While most digital audio workstations allow you to select your input from within the application, setting the input at the system level streamlines the recording process. To set the device for input, click on it within the list of available audio interfaces.

If you do not see the audio interface in this list, first make sure that the audio interface is turned on and connected properly. Make sure it’s plugged directly into your Mac rather than a USB hub.

You’ll also want to set your output device appropriately. If you will be monitoring your mic from the headphone jack on your audio interface, make sure the audio interface is selected in the “Output” tab of the Sounds preference pane. If you will be connecting headphones to your Mac’s headphone jack, make sure “Built-In” is selected as the audio output.

Don’t try to record without headphones. It’s dramatically more difficult to get clean audio that way, and you’ll have no way of double-tracking if you so choose. Even cheap earbuds are better than nothing.


Connecting your mic to your Mac is a simple process: it’s basically plug and play! If you are having trouble getting the microphone or audio interface to connect, check with the manufacturer’s installation process to ensure there aren’t any special steps or software you need.

With the mic physically connected and configured, you’ll need the appropriate software. Audacity is a popular open-source choice, and the new Voice Memos app for macOS can make simple single-track audio recordings as well.

Alexander Fox Alexander Fox

Alexander Fox is a tech and science writer based in Philadelphia, PA with one cat, three Macs and more USB cables than he could ever use.


  1. I have an XLR type mic but thought using my headset mic would be easier. Unfortunately, it doesn’t appear to work. I may need to go the XLR route. Thanks for the info.


  2. As far as I can see, although it’s mentioned, there’s no advice on connection a microphone to the headphone jack as Line In. Without changes to MacOS the simple Use Audio Port for … has gone as a drop down option in Preferences :(

    1. Hi I have a imac 27inches and I purchased brand new Condenser Microphone Set from trademe and I trying to connect to my imac and in sound settings shows👇
      Sound Effects
      Internal speakers

      output showing
      internal speakers Built in
      USB Audio Device USB

      And input showing
      internal microphone Built in
      Line in Audio line-in-port
      USB Audio Device USB

      But still my voice showing in my imac but no microphone voice coming out I can’t hear my voice outside so please help me this matter how to fix this or any other settings in my imac need to change please reply me.

      1. Make sure you’ve selected “USB Audio Device” on the Input pane and “Internal Speakers/Built-In” on the Output pane. If you set the microphone as your output, you won’t hear anything because it’s not a speaker.

  3. Hi,
    I have a wireless lav mic which I am plugging in to the head phone jack on my macbook and iphone se. Neither device seems to recognize the mic. Any idea what the problem might be?

    1. The answer depends a bit on what Mac you’re using specifically. Some Macs have a combined Headphones/Line-In port, and some have only a headphone port. If you have a Mac with a Headphone/Line-In port, you’ll need to set the port to Line-In mode to be able to capture audio from the microphone. Newer Macs, however, may not have that feature.

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