I am currently using a iMac Core 2 Duo 3.33 GHz with the built-in audio hardware. I just installed MaxMSP for the first time tonight and briefly took a look at the DSP Status setup. Everything appears to be correctly configured. The trouble comes about when I attempt to actually make sound with MaxMSP. I tried a few tutorials and discovered that I will hear sound the first time I try. When I turn that audio off, for example in MSP Tutorial 1's test tone patch. The moment I press 'stop', the audio will never come back on. I've trying opening different tutorial patches and such, checking the DPS Status along the way and no settings have been changed or altered.