FAQ:Installing the LAME MP3 Encoder
From Audacity Development Manual
Audacity does not include MP3 encoding software or distribute such software from its own websites. Instead, use the following instructions to download and install the free and recommended LAME third-party encoder to export MP3 files with Audacity.
- Windows: See the LAME installation section on Installing and updating Audacity on Windows.
- Mac: See the LAME installation section on Installing and updating Audacity on Mac.
- Linux/Unix: See the LAME installation section on Installing and updating Audacity on Linux.