LAME is an open source audio encoder. 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.
Full Specifications
What's new in version 3.99.5
General
ReleaseFebruary 18, 2016
Date AddedFebruary 18, 2016
Version3.99.5
Operating Systems
Operating SystemsMac OS X 10.4 PPC, Mac OS X 10.5 PPC, Mac OS X 10.3.9, Mac OS X 10.4 Intel, Mac OS X 10.5, Mac OS X 10.5 Intel, Macintosh, Mac OS X 10.4