After installing macOS Mojave or later, you might see an alert that says audio input isn't accessible when trying to record. Or you might not hear sound, see waveforms, or see audio meters move when recording. To record audio, allow the app to access audio inputs:
Garageband Audio Recording
Full review: GarageBand for Mac review Features: Before discounting GarageBand to move on to another software package it's worth taking a deeper look at what this free app can really do. Clicks and Pops on the Mac. Tip – When experiencing clicks and pops on a Mac, try raising the buffer size in the audio app. In Logic, for example, choose Logic Pro Preferences Audio, click the Devices tab, then the Core Audio tab, and set the I/O Buffer Size to the next highest number.
- Close the app you're using to record audio.
- On your Mac, choose Apple menu > System Preferences, click Security & Privacy, then click Privacy.
- Click Microphone.
- Select the checkbox next to an app to allow it to access the built-in microphone on your Mac, an external USB mic, or the inputs on an external audio interface.
- Open the app and try to record audio again.
If you're using an external microphone or an external audio interface to record audio and it's still not working, check with the manufacturer of your device for software updates and information on compatibility.
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Here are some more resources to help with recording audio: