How to Untether Your iOS Jailbreak (Mac) [4.2.1]

These are instructions on how to untether your jailbreak of iOS 4.2.1 using the iPhone Dev-Team's 'backup plan' method on Mac OS X.

Currently this beta is limited to iPhone4, iPad, and iPod touch 4G. Bluetooth functionality is disabled for the time being until some issues are resolved.

Requirements:
You will need to have access to the iOS 4.2b3 ipsw and your iOS 4.2b3 SHSH blobs saved. You also already need to be jailbroken on iOS 4.2.1. MAKE SURE YOU BACKUP BEFORE ATTEMPTING THIS AS IT IS A BETA!

Step One
Create a folder called Pwnage on your desktop and in it place:
-
- iOS 4.2.1 ([url=http://www.iclarified.com/entry/index.php?enid=750 new=true]iPhone, iPad, iPod touch)
- iOS 4.2b3 *Only iPhone developers have legit access to this firmware


Step Two
Double click the RedSn0w archive to extract it. Then launch RedSn0w from the extracted folder.


Step Three
Click the Browse button


Select the iOS 4.2.1 ipsw from the Pwnage folder on your Desktop and click Open.


Click the Next button to continue.


RedSn0w will now prepare the jailbreak data.


You will now be presented with a list of checkboxes.


Select Jailbreak Monte (untether) from the list of checkboxes. You will be asked to select the iOS 4.2b3 ipsw from the Pwnage folder on your desktop then click Open. Click Next to continue.




Please plug your iPhone into the computer and make sure its OFF then click the Next button


RedSn0w will now guide you through the steps to get into DFU mode. You can find more help with DFU mode here


Hold down both the Home button and the Power button for 10 seconds.


Release the Power button and continue holding the Home button until RedSn0w detects the device.


RedSn0w will prepare Jailbreak Monte files, exploit with Limera1n, Upload RAM Disk and Kernel, and Send Jailbreak Monte files.


RedSn0w will inform you when it has completed successfully.

How to Jailbreak and Unlock Your iPhone 3G, 3GS Using BlackSn0w [Mac]

These are instructions on how to jailbreak and unlock your iPhone 3G and 3GS using BlackRa1n and BlackSn0w for Mac.

These instructions will work with the latest 3.1.2 firmware, the 05.11.07 baseband, and iPhones which require hactivation. If you have already jailbroken following these instructions will be easier.

For those with a new iPhone 3GS (updated Bootrom), BlackRa1n only supports a tethered jailbreak. This means that once jailbroken you should not let your battery die. If it does die you will need to reconnect it to the computer and use BlackRa1n to boot it.


Before continuing make sure you are on the 05.11.07 baseband by following this tutorial. If you are on 5.12.01 or higher, unfortunately you CANNOT jailbreak as of yet. If your baseband is lower than 05.11.07 then you must restore to the 3.1.2 firmware for the iPhone 3G or 3GS. You can do this by opening iTunes, selecting your iPhone from the list of devices on the left, then hold down the Option key and click Restore.

You can find the Windows version of this tutorial here. Ok lets begin...

Watch the Video!
For your convenience this tutorial is available in video format also. Click the Watch It button to view the tutorial!

Step One
Open your web browser of choice and navigate to http://www.blackra1n.com. Click the Apple logo at the bottom of the screen.


Step Two
When prompted save the download to your desktop


Step Three
Then double click the downloaded blackra1n zip file to extract the application, then double click the application icon to launch the program


Step Four
Make sure your iPhone or iPod is connected to the computer then click the large make it ra1n button


Step Five
You iPhone will now be placed in recovery mode.


You will see a picture of GeoHot that replaces the regular recovery mode screen on your device.


blackra1n will run and then your device will reboot.


A popup message will appear informing you that BlackRa1n is free software and if you appreciate it you can donate to GeoHot at geohot@gmail.com.


Step Six
Once your device reboots it will be jailbroken and you will notice a blackra1n icon on the Springboard. Make sure you have an internet connection and press to launch the application.


Choose the installer application of your choice then press to select sn0w if you would like to unlock your device. Press the Install button at the top right of the screen to begin.


BlackRa1n will begin to download and install the packages you selected.


If you chose to unlock device using blacksn0w you will be presented with a Post Install log for sn0w. CommCenter will be restarted and there is no need to reboot. If your carrier doesn't support 3G then disable it. Press the Close button to continue.


Step Seven
Once complete BlackRa1n will respring your iPhone and you will find the installer package of your choice on the Springboard.


Step Eight
Once you have confirmed your installer package is working correctly you may use the Uninstall blackra1n button inside the BlackRa1n app to remove it from your springboard.