Hi Ben, AFAIK Pd doesn't have -rt on anything except Linux. Core Audio + Pd doesn't run too smooth anyways, I would try it with JACK. HTH, D. On 3/7/10 7:25 AM, B. Bogart wrote: > Are there versions of pd-extended for OSX where -rt works? How do I set it. -- ::: derek holzer ::: http://macumbista.net ::: ---Oblique Strategy # 167: "Use cliches"