For the users using a Macintosh,

after several hours the Evaluation Board is working  on my Macintosh (intel).

1) install the development package with xcode, its on the OS X installation DVD

2) install the libusb binary from http://www.ellert.se/twain-sane/

3) modify the makefile  for compiling drs_exam (attached) afterwards it's running perfect!

best,

Armin