depending on who you talk to, waveburner pro is developing a OSX version. At least that's what they told me in an email. Spark dropped there support for OSX. so that leaves JAM and a company called DSP Quatro which looks like spark. that's it and it sucks.

They've been telling me they will release Waveburner for OSX "the next week" since the beginning of this year!

Indeed it sucks.

Is DSP Quattro usable? Better than Toast with Jam?

If you like spark, then you'll like quattro. I personally don't like it. Now if they can marry waveburner with spark, that would be cool.

Does a burning program actually affect the resulting master? I thought everything depended on your burner vs. media...

-G

All 3 determine the outcome. Depending on the quality of the DAE engine in the program, it can affect the audio if ANY processing is done at all.