I think your best bet is going to be Macdive:
MacDive - Download
If you look at the "Devices" tab you won't see Sherwood, but you will see Oceanic and Aeris, other badges for the Pelagic designs.
Macdive interface suport is based on libdivecomputer, see
libdivecomputer, a library for communication with various dive computers. and note that Sherwood is listed - Wisdom, not Wisdom 2 specifically, but keep reading.
Most promising for you, the author of Macdive, Nick, is t0w here on scubaboard, is actively adding devices, and regularly reports program status in the thread
http://www.scubaboard.com/forums/co...s-analyzers/225186-new-mac-os-x-dive-app.html
In a very recent post #297, 12/28/09, he said that he's recently added a bunch of Pelagic devices, to be in a near-future update. I'd suggest waiting for that, and if your Wisdom 2 still isn't supported, contact him as he has invited. You may need to provide some data dumps from your computer to help with development, but the progress in adding devices to Macdive over the past year is impressive, and it's certainly moving in the direction you need.