Well, I have the FIP for mac working, I just need to finish up the external drivers so your mac will read your featherweight altimeter. In the meantime, The FIP will let you save settings and view data for now, and once i get the driver working it will have full functionality.
So, Without further ado;
You can in fact update the FIP program, And the USB connectivity should be working. Post or PM with errors
Thanks to Troj for hosting the file!