I have a 8 processors Mac system (Mac Pro) with OS X 10.5 (Leopard). I followed the instructions that are on Bedpost web page. I set the FSLMACHINELIST and the FSLREMOTECALL, then I launched bedpost. Unfortunately this is not sufficient. On the terminal window I can read "Queuing parallel process stage"(or something similar, I don't remember exactly), but I can distinctly see on the CPUs monitor that only one CPU is used. In addition nothing else has happened after these words appeared, like the process is stalled. Me and my colleagues suppose that the problem is the ssh, though it should be enabled. I write from Italy, then I hope you will excuse me for my not so good English. Best Regards, Alessio Moscato Medical Physicist Niguarda Ca'Granda Hospital, Milan, Italy