From the MEKA homepage:

MEKA is a multi-machine emulator for MS-Windows [Mac OS X] and GNU/Linux (older versions support MS-DOS).

The following machines are supported by MEKA:

Downloads Windows Mac OS X Linux Android
Downloads (See below)
Latest Builds - Not Stable Releases! (Old → New) Size Date Uploaded (DD/MM/YY)
meka-405-macosx.tar.bz2 1.1 MiB 19/12/12 20:37:57
meka-439-macosx.tar.bz2 1.11 MiB 13/12/13 17:35:20
meka-451-macosx.tar.bz2 1.11 MiB 05/01/14 21:57:08