I have been working for hours to get Avrdude 5.8 installed with usb support on my Mac with OS X 10.6.2.

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I finished building my USBtiny kit (that I got from you) and wanted to test it on a simple Atmega 48 circuit, but even after installing libusb 1.12 and Avrdude 5.8 several times, Avrdude keeps giving me an error telling me I still need to install libusb, recompile avrdude and then reinstall avrdude.

AVR Tools provides a Mac OS X GUI for avrdude. The program also includes a terminal emulator which can be used to talk to serial ports, such as the spare RS-232 port on the Atmel STK500 Development board. The terminal emulator can be run stand-alone, without connecting AVR Tools to any development board. Avrdude version 5.5 and higher has built-in support for USBtinyISP! Look below for instructions for windows and mac on how to install the correct version of avrdude. To test that avrdude is working properly open a command line and run the command avrdude -c usbtiny -p m8 while the device is plugged in (the green LED is lit).

I was going to trying to test it with the command. 'avrdude -c usbtiny -p m48' to see if it would talk to the chip, but it just gives me that error about needing libusb installed.
Just for the heck of it, I also downloaded Arduino 0017 and tried the burn boot loader option becase I know it suports the USBtiny. All I get is 'avrdude: initialization failed, rc=-1' when I do that.
I'm new to all this stuff and don't understand why I can't get avrdude to install with usb support... HELP!!!
I don't get it. Is there some other way I can test the USBtiny?

Avrdude Software

About the App

• App name: avrdude
• App description: Atmel AVR MCU programmer
• App website: Not Available

Install the App

1. Press Command+Space and type Terminal and press enter/return key.
2. Run in Terminal app:
   ruby -e '$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)' < /dev/null 2> /dev/null
   and press enter/return key.
   If the screen prompts you to enter a password, please enter your Mac's user password to continue. When you type the password, it won't be displayed on screen, but the system would accept it. So just type your password and press ENTER/RETURN key. Then wait for the command to finish.
3. Run:
   brew install avrdude

Done! You can now use avrdude.

Avrdude Download Mac Download