Hi,

I'm running pyusb-1.0.0-a1 on Python 2.5.1 on OSX 10.5.8 and getting 
this error with connecting to the backend.

Python 2.5.1 (r251:54863, Jun 11 2008, 17:26:19)
[GCC 4.0.1 (Apple Inc. build 5465)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import usb.core
 >>> usb.core.find()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/Users/myhome/pyusb-1.0.0-a1/usb/core.py", line 829, in find
     raise ValueError('No backend available')
ValueError: No backend available

Also the same error from running tests/testall.py

.E.....
======================================================================
ERROR: runTest (test_util.FindDescriptorTest)
----------------------------------------------------------------------
Traceback (most recent call last):
   File "/Users/myhome/Downloads/pyusb-1.0.0-a1/tests/test_util.py", 
line 66, in runTest
     d = usb.core.find(idVendor=ID_VENDOR)
   File "/Users/myhome/Downloads/pyusb-1.0.0-a1/usb/core.py", line 829, 
in find
     raise ValueError('No backend available')
ValueError: No backend available

----------------------------------------------------------------------
Ran 7 tests in 0.005s

FAILED (errors=1)

It seems like libusb isn't installed correctly, but I used 'sudo apt-get 
install libusb' and after installing pyusb openusb.py, libusb10.py and 
libusb01.py are in /sw/lib/python2.5/site-packages/usb/backend. Am I 
missing something?

Also setting the dubug var gives me this:

ERROR:usb.backend.libusb10:Error loading libusb 1.0 backend

Chris


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