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DFU.txt
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The real DFU MODE (Device Firmware Update), is kinda sorta a SECRET magic trick.

It may take you a few attempts to get your iPhone or iPod Touch into DFU mode, just keep trying !

The big difference between DFU mode and restore mode ?

- DFU mode doesn't boot up the "OS".
- Therefore it doesn't communicate with iTunes "as much".
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UPDATE: Sat Sep 12 17:22:38 HST 2009

- Running 10.6.1 w/iTunes v9
DFU mode seemes to work just fine !

#1) Connect to Mac and keep iTunes open.

#2) Keep BOTH keys down for 8 seconds, then let go of the POWER button.
#3) Keep holding HOME until iTunes says "Restore Mode", even though we are realy in DFU.

NOTE: You will NOT see the APPLE LOGO or the USB CONNECT TO ITUNES logos !!!!
      If you do, you messed up, try again.

#4) iTunes will "recover" your iPod, you will then see a low level "progress bar".
#5) AFTER that, the iPod will boot with the USB CONNECT TO ITUNES "restore" logo !!!!!!

=-> The SAFE BET is to do a "NEW IPOD" install !!!

Yeaaaa !

INFO:

USB CONNECT TO ITUNES "restore" logo URL: http://www.hackerskitchen.com/iTouch/images/no-need-to-activate.gif
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UPDATE:

DFU Issues in OS X 10.5.6

Lots of users have been experiencing problems with the use of DFU mode after applying yesterday's 10.5.6 system update.

We believe this behavior is due to a kernel bug not a specific countermeasure by Apple.
Possible fixes are (try at your own risk!) -

1. Replace the following plugin kexts from within IOUSBFamily.kext with the ones from 10.5.5 and then rebuild kextcache,
 if you don't understand this, then you shouldn't attempt it!

/System/Library/Extensions/IOUSBFamily.kext/Contents/PlugIns/AppleUSBHub.kext
and
/System/Library/Extensions/IOUSBFamily.kext/Contents/PlugIns/IOUSBCompositeDriver.kext

2. Use a USB hub in-between the DFU device and the Mac and insert/reinsert the iPhone's USB cable.
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URLs:

=-> http://www.HackersKitchen.com/iTouch/10.5.5_kext-files/

- http://blog.iphone-dev.org/post/65126957/tis-the-season-to-be-jolly
- http://www.hackint0sh.org/forum/showthread.php?t=27348
- http://www.hackint0sh.org/forum/showthread.php?p=374065
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