I'd like to add a voice for the demand for Mac OS X support.
There are lots of USB oscilloscopes on the market. I've only found one brand that has native Mac support (Bitscope
I would rather not buy a Parallels license and a Windows license just to run an oscilloscope software. I imagine they might cost as much as the oscilloscope taken together. I think most Mac users want a native solution.
A good OS X software would give you a unique selling point, and I am sure there are lots of users like myself who have looked at the various USB scopes out there and given up on getting one because of the lack of Mac support.
You could publish the USB protocol specification, and if you're lucky someone might write the software for you.
If you do decide to develop some OS X software, send me an E-mail and I will consider buying one of your scopes.