Yes, there appear to be a few Express VIs that work on 9.2, but the none of the DAC I/O (AI Read, AI Write) Express VIs work as advertised for PC compatibles. I saw too that one needs the Real Time Module for Mac OS X and I agree with your assessment. It appears to me that NI is heading towards reduced support for Mac rather than, as their statement on the /Mac link claims, a committment to continued support of Macintosh data acquisition. Does this translate to mean only for legacy Mac systems? I'd really like to hear some feedback from an NI rep about these issues.