MESS runs on Windows, Mac OS X, Linux, and FreeBSD. If you also use MAME, you may want to get [http://mamedev.emulab.it/haze/latest-ume-mame-mess-binaries UME] instead, which combines MESS and MAME into a single executable with a shared configuration file, <tt>ume.ini</tt>.
On OS X, you can install MESS via [http://brew.sh/ Homebrew]:
brew tap homebrew/games
brew install mess
The binary is called mess, not sdlmess as on Linux.
==Command line arguments==