Quick answer: for audio files that are already in your music library, the Mac's Music app can make an MP3 copy (set Import Using to MP3 Encoder, then File > Convert > Create MP3 Version). For videos (MOV, MP4, MKV, WEBM) or any file you don't want to import, a browser-based converter is the quickest: drop the file, pick a bitrate and download the MP3. Both options are free.
A Mac comes with good media tools, but none of them is a general "convert anything to MP3" button. The Music app handles audio, QuickTime Player handles video but exports M4A, and Voice Memos exports M4A too. This guide shows which tool fits which file, gives the exact steps for each, and covers bitrates, file locations, limits and the problems that come up most often.
Which Mac method should you use?
| Your file | Best method | Why |
|---|---|---|
| Songs or M4A/AAC files you keep in Music | Music app | Built in, can convert several songs at once, keeps the copy in your library |
| A MOV or MP4 video (iPhone footage, screen recordings) | Browser converter: MOV to MP3 or MP4 to MP3 | The Music app doesn't take video, and QuickTime exports M4A, not MP3 |
| WAV or FLAC files | Browser converter: WAV to MP3 or FLAC to MP3 | Pick 256–320 kbps for lossless sources |
| An OPUS, OGG, WEBM or MKV file | Browser converter: Audio to MP3 or Video to MP3 | The Music app doesn't handle these formats |
| A Voice Memos recording | Export as M4A, then M4A to MP3 or the Music app | Voice Memos saves M4A |
| An audio file you want to trim first | GarageBand | Free from Apple, exports MP3 with a quality setting |
| A long video or a whole folder | Desktop software (for example FFmpeg or VLC) | No browser memory limit and no 150 MB cap |
What to choose in one line
If the file is audio you want in your music library, use the Music app. If it's a video or an unusual audio format, use a browser converter. If it's very large or there are many files, use desktop software.
How do you convert to MP3 with the Music app?
Apple documents this method for M4A files and songs in your library:
- Open Music and choose Music > Settings.
- Click Files, then Import Settings.
- Set Import Using to MP3 Encoder, choose a setting such as High Quality, and click OK.
- Select the songs you want (drag files from Finder into Music first if they aren't in your library).
- Choose File > Convert > Create MP3 Version. The MP3 appears next to the original.
- To find the file, select it and choose File > Show in Finder.
If Create MP3 Version is greyed out, the track is usually in the cloud only or protected. Apple Music subscription tracks and old protected purchases can't be converted.
How do you convert files without adding them to the library first?
Apple describes a shortcut for files that live in a folder or on a disk: hold down the Option key and choose File > Convert > Convert to MP3, then select the folder or disk. Music imports the songs and converts them at the same time, so both the originals and the MP3 copies appear in your library. You can then find them with Show in Finder.
Which quality setting should you pick in Music?
The MP3 Encoder offers presets and a Custom option where you can set the bitrate directly. For music you care about, a custom setting of 256 or 320 kbps is a good choice. For podcasts and spoken word, 128 kbps is plenty. Remember to set Import Using back to your usual format afterwards if you also import CDs, because the same setting controls CD imports.
Will the Music app duplicate your songs?
Yes, on purpose: it creates an MP3 version alongside the original, so you'll see two copies of each converted song. If you only needed the MP3 to copy somewhere else, you can delete the extra copy from your library after moving it.
How do you convert to MP3 with GarageBand?
GarageBand is free from Apple and can export a song as MP3 with a choice of quality. Apple documents it as a second way to turn an M4A file into MP3, and it also works for WAV and AIFF files. It takes a few more clicks than the Music app, but it doesn't touch your music library, and you can trim or adjust the volume before exporting.
- Open GarageBand, choose File > New, select Empty Project and click Choose.
- In the Create New Track window, select Mic or Line.
- Drag the audio file from Finder into the Tracks area.
- Click the Metronome button to turn it off, so it isn't part of the export.
- Select the file in the Tracks area, then choose Share > Export Song to Disk.
- Select MP3, pick a setting from the Quality menu, and choose to export the length of the selected region.
- Choose a name and location, then click Export.
GarageBand is best when you want to edit first, for example to cut the silence at the start of a recording. For a straight conversion, the Music app or a browser converter is quicker.
How do you convert a video to MP3 on a Mac?
- Open Video to MP3 in Safari, Chrome, Firefox or Edge.
- Drag the MOV, MP4, MKV or WEBM file onto the page (up to 150 MB).
- Choose 192 kbps for videos with music or 128 kbps for talks and meetings.
- Click Convert to MP3 and wait for the progress bar.
- Click Download MP3. The file goes to your Downloads folder.
The conversion runs inside your browser. The page downloads its engine, but your video isn't uploaded. Convertola keeps the first audio track of the video.
Videos from your iPhone
iPhone videos usually arrive on the Mac as MOV files through AirDrop, iCloud Photos or the Photos app. In Photos, select the video and choose File > Export to save a copy to a folder, or drag it to the desktop. Then use MOV to MP3. Some videos that were shared or edited are MP4 instead; Video to MP3 handles both.
Can QuickTime Player convert to MP3?
Not directly. In QuickTime Player, File > Export As > Audio Only saves the soundtrack as an M4A file. That's useful if your video is larger than a browser can handle, because the M4A is much smaller than the video. Then convert the M4A with M4A to MP3 or the Music app.
- Open the video in QuickTime Player.
- Choose File > Export As > Audio Only.
- Choose a name and a location, then click Save.
- Convert the M4A to MP3 in the browser or with the Music app.
This two-step route is the free built-in way to handle long recordings, such as an hour-long meeting, that would be over 150 MB as video but far smaller as audio.
How do you convert a Voice Memo to MP3 on a Mac?
Voice Memos on the Mac stores recordings inside the app, so export the file first. Use the Share button to save or send the recording, or drag it from the list of recordings into a Finder window. The exported file is an M4A.
- Export the recording as described above.
- Open M4A to MP3 and drop the file on the page.
- Choose 128 kbps for speech.
- Convert and download.
How do you convert a screen recording to MP3 on a Mac?
Press Shift-Command-5 to open the Screenshot toolbar, choose a recording option and click Options to pick a microphone. If you don't choose one, the recording has no sound, and there will be nothing to convert. Recordings are saved to the desktop by default as MOV files.
Once you have the recording, use MOV to MP3. The screen recording to MP3 guide covers the audio settings in more detail, including iPhone and Windows.
Which bitrate should you pick on a Mac?
| Source | Recommended bitrate | Why |
|---|---|---|
| Speech, meetings, lectures | 128 kbps | Speech doesn't benefit from more |
| iPhone videos, M4A/AAC music | 192 kbps | The source is already compressed |
| WAV, AIFF exports, FLAC | 256–320 kbps | Lossless sources keep more detail at higher bitrates |
In terms of size, 128 kbps uses about 0.96 MB per minute, 192 kbps about 1.44 MB and 320 kbps about 2.4 MB. For the full comparison, see what MP3 bitrate should you use.
Where do the MP3 files end up?
- Music app: inside your Music library folder. Select the song and choose File > Show in Finder to see the file.
- Browser converter: your Downloads folder, unless your browser asks where to save. In Safari, the downloads button in the toolbar lists recent downloads.
- QuickTime export: wherever you chose in the Save dialog.
What are the limits of each method?
- Music app: only formats Music can import, and protected tracks are blocked. It handles many songs at once and keeps them in the library.
- Browser converter: one file at a time, up to 150 MB on Convertola, and very long files depend on your Mac's free memory.
- QuickTime Player: exports M4A only, so a second step is needed for MP3.
- Desktop tools: no size cap, but you need to install them. Download FFmpeg, VLC or Audacity only from their official sites.
Should you keep the original file?
Yes, at least until you've checked the MP3. MP3 is a lossy format, so the conversion can't be undone, and converting an MP3 back to another format won't restore what was removed. Apple's own help page on converting songs makes the same point: if you convert a compressed song to an uncompressed format, it takes more space but doesn't sound better. If you might need a different bitrate later, convert again from the original rather than from the MP3.
Troubleshooting on a Mac
| Problem | Likely cause | Fix |
|---|---|---|
| Create MP3 Version is greyed out | The song is cloud-only or protected | Download the song first; protected tracks can't be converted |
| The menu says Create AAC Version | Import Using is still set to AAC | Change Import Using to MP3 Encoder in Music settings |
| The MP3 has no sound | The video or screen recording has no audio | Play the original; record again with a microphone selected |
| The browser can't handle the file | The video is over 150 MB | Export Audio Only in QuickTime, then convert the M4A |
| The format isn't accepted | WMA, AVI or another unsupported format | Use VLC or FFmpeg for those formats |
Is it safe to use a free MP3 converter on a Mac?
The built-in apps are the safest of all. For anything else, prefer a browser converter that doesn't upload the file, or well-known open-source software downloaded from its official site. Be cautious with "free Mac MP3 converter" downloads from download portals: some installers bundle extra software. macOS warns you when an app comes from an unidentified developer, and that warning is worth taking seriously. For more checks, read how to choose the best MP3 converter.
Frequently asked questions
Does a Mac have a built-in MP3 converter?
Yes, for audio. The Music app can create MP3 versions of songs and M4A files after you set Import Using to MP3 Encoder. It doesn't convert video files.
How do I convert a MOV to MP3 on a Mac?
Open a browser converter such as Convertola's MOV to MP3 page, drop the MOV file, choose a bitrate and download the MP3. Or export the audio as M4A with QuickTime first and then convert the M4A.
Why is Create MP3 Version greyed out?
The song is usually stored only in iCloud, or it's protected, such as an Apple Music subscription track. Download the song to your Mac first. Protected tracks can't be converted.
Is it safe to convert files on a Mac in the browser?
With Convertola, yes: the file is processed in your browser and isn't uploaded. In general, avoid converter sites that ask you to install extensions or download an app.
Can QuickTime save audio as MP3?
No. QuickTime Player's Audio Only export saves an M4A file. Convert that M4A to MP3 with the Music app or a browser converter.
What bitrate should I use in the Music app?
256 or 320 kbps for music you care about, 128 kbps for speech. Use the Custom option in the MP3 Encoder settings to set it.
Where does the Music app save MP3 versions?
In your Music library, next to the original song. Select the MP3 version and choose File > Show in Finder to see the file.
Can GarageBand export MP3?
Yes. Add the audio file to an empty project, then choose Share > Export Song to Disk, select MP3 and pick a quality setting. It's a good option when you want to trim the audio before exporting.
Sources
- Apple Support: Convert an M4A file to MP3 on Mac
- Apple Support: Convert a song to a different file format with the Apple Music app
- Apple Support: Export movies to other file formats using QuickTime Player on Mac
- Apple Support: How to record the screen on Mac
- MDN Web Docs: Web audio codec guide
Ready to convert? Drop your file into the Convertola MP3 converter. It runs in your browser and accepts MOV, MP4, M4A, WAV, FLAC and more.
