I did a search on this, didn't seem to turn up anything. Forgive me if I missed it.

I'm having trouble getting pd to read from my microphone jack. Every time I switch it from portaudio to jack, it crashes.

I'm on a MacBook Pro with OSX 10.5.4 and pd 0.40.3.extended.

Any help would be appreciated.

does it crash even if you haven't loaded up a patch at all? what about if you switch while 'compute audio' is unticked?

Yes for both. It crashes no matter what. It seems to be a system error and could very well be no fault of Pd. (I'm mainly a PC guy so any system fix tips would also be helpful although I know this is the wrong place for it.)