Daniel Schreij reports that he's running OpenSesame, the open-source experiment builder, on Mac OS. Screenshot or it didn't happen (click for full version):

I'm very excited about this! The installation procedure appears to be quite daunting, but at least we know that it works, which brings the goal of providing a user-friendly Mac OS package that much closer. As soon as we have compiled a decent installation tutorial (for the tech-savvy Mac users), it will be posted here, so stay tuned.

More screenshots (click for full version):

Thanks Daniel!