another error 21 problem

[b-boy]

Hi all, sorry to bother you all with another 21 error.

I have a macbook pro with 10.5.6 OS
Brandnew iPhone just unpacked (not unlocked)
pwnage tool 2.2
iPhone1,2_2.2_5G77_Restore.ipsw

I have followed the instructions here Pwnage 2.x Guide 3G - ModMyi - Wiki

created a custom_restore file with a 1gb partition as instructed. I have then tried to use itunes to load the file and this is where I'm a little confused. The guide mentions putting the phone in home and sleeps keys for 25 seconds to put it in recovery mode. This seems to be different to the dfu mode that is mentioned else where.

I have tried what I think is dfu mode in I tunes but I get the error 21 problem.

I noticed volkspost about dfu mode in 10.5.6, I again followed the instructions but at the point of all the apps being closed the OS didn't reboot. I have the back up files on my desktop but I cant find the updated files in /system/library/extensions

So I have what I think is a good replacement .ipsw file I just need to get itunes to use it to restore. Has anyone out there managed this with 10.5.6 and if so can anyone help with simple step by stem instructions

Thanks for your time

Regards

[keithharper]

I have finally gotten this thing to work! I'm not sure if the answer is out there multiple times or not, and if so, I apologize... I couldn't find the answer in one place so I thought I'd post it here... I have tried so many things, I was beginning to give up! First off, let me tell you that I have been jailbreaking iPhones since the very beginning... I have been getting the error 21 since I tried jailbreaking a new iPhone (meaning it has never been jailbroken) running firmware 2.2, using a MacBook Pro with OS X 10.5.6 installed. Also, I'm up to date with iTunes as well (8.02)

So, I was able to get this to work and I tried three different suggestions on this forum. I'm not sure which one worked, or if it was the combination of the three...

1) I restored my iPhone back to factory settings using the ispw in iTunes so that I would have a clean canvas to start with.

2) There is a problem getting into DFU mode in 10.5.6 so I used the automator work flow found here: iClarified - iPhone - How to Enable DFU Mode in Mac OS X 10.5.6
(this did not restart for me like it said it would, so I just restarted when it was finished)

3) I used a powered USB hub. Many people suggested this as the USB hub uses it's own drivers so it may keep your computer from using drivers or something in the OS that prevents DFU mode.

Once I did those three things all was well. Just do the steps using Quickpwn or, as I did, Pwnage Tool 2.2.1... If you're using the latter, just create your custom restore file (ispw) and then, if you are connected using a USB hub, you should be able to get into DFU. Then just option restore using the new ispw. (You don't even have to rename the custom ispw)

Good luck!
Keith