LAME Audio Encoder

Audio encoder for mp3 files, built for OS X

Free! Click here to download version 3.99.5. Runs in OS X 10.6 and higher.

Due to popular request, I also have an installer for the older version 3.97.

LAME is an open source audio encoder. It is NOT developed by Thalictrum. We give you a pre-packaged installer for OS X as a convenience. All necessary information, license and source code can be freely obtained from the official lame site, or from

I wil not support the LameLib used by Audacity. You can obtain that from, as indicated on their website.

Frequently Asked Questions

What is the encoder exactly?

The encoder is not a graphical application that you can double-click, but a command-line tool, usable from the Terminal application (which lives in the Utilities folder inside the Applications folder) or other graphical applications.

How do you use it?

You can use it directly from the Terminal, by invoking the lame tool. See its man page for options and syntax, or, after installation, you can read the documentation for the lame tool by pointing your browser to file:///usr/local/share/doc/lame/html/index.html

There are several applications that use LAME to convert audio files to mp3. Examples can be found here.

What gets installed where?

The lame encoder and its accompanying files go into some directories that are normally not visible in the Finder. The following files are installed:


How can I uninstall LAME?

To uninstall, use the uninstaller, which is a separate download.

If that fails, you could try this shell script.