[avrdude-dev] avrdude: usbdev_open(): did not find any (matching) USB device "usb" error on Mac OS X

[JS]

Hi,

I'm on Mac OS X Intel. I just installed a fresh version of Avrdude 
(version 5.5) using the AvrMacPack. I'm trying to use it to program a 
ATTiny chip on an AVR ISP MKII.

I get an error when trying to run it:

% avrdude -c avrisp2 -p t13 -v -P usb
avrdude: Version 5.5, compiled on Mar 18 2008 at 20:25:02
        Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/

        System wide configuration file is 
"/usr/local/AVRMacPack-20080318/etc/avrdude.conf"
        User configuration file is "/Users/tats/.avrduderc"
        User configuration file does not exist or is not a regular 
file, skipping

        Using Port            : usb:xxx
        Using Programmer      : avrisp2
avrdude: usbdev_open(): did not find any (matching) USB device "usb"

I guess it is libusb that plainly doesn't find the devices (?) Any ideas?

--
J. S. Senécal
http://drone.ws