Mac OS X – 10.6+, 64-bit Intel
Vista Windows XP/Vista/7 (Note: This includes a bundled JRE7 to correct a JVM crash bug in the latest JRE)
Linux (32 bit)
Linux64 Linux (64 bit)

Thanks for trying out OneSwarm. Remember that OneSwarm is research software that is still under active development. Do not rely on OneSwarm for strong anonymity. Although OneSwarm is in active use by many thousands of users, many bugs likely remain undiscovered. OneSwarm is free and open source software that is offered as is with no warranty.