I'm re-releasing a compiled version of TiMidity++ for Mac OS X in an installer package. I've compiled it in 64-bit Intel format for Leopard and Snow Leopard. TiMidity++, which hasn't changed much, if at all, since the last release, is useful generally for converting MODs to AIFFs, which can then be turned into MP3s or AACs in iTunes. More information can be found on the product page, a link to which can be found under "My Ports" in the sidebar.