How to Jailbreak Your iPhone 4 Using Greenpois0n (Mac) [4.2.1]

How to Jailbreak Your iPhone 4 Using Greenpois0n (Mac) [4.2.1]

Gregoris

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Step One
Open your web browser of choice and navigate to Greenpois0n.com. Click the Mac link at the bottom of the screen.

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Step Two
When prompted save the download to your desktop

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Step Three
Double click the downloaded greenpois0n-osx_rc5.zip file to extract the archive then double click greenpois0n from the desktop to launch the application

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Step Four
Connect your iPhone to the computer, power it off, then click the large Jailbreak button

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Step Five
You will now be instructed on how to place your iPhone into DFU mode. You can get help with this here.

You will be asked to press and hold the sleep button for 3 seconds.

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Continue holding sleep; press and hold home for 10 seconds.

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Release sleep button; Continue holding the home button. Do not release the Home button at this point!.

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Step Six
Once your iPhone is successfully in DFU mode the jailbreak will begin.

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Step Seven
Once Greenpois0n informs you that it has completed you can release the Home button. Click the Complete button to close the application.

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You'll notice some verbose mode text scrolling on your device.

Step Eight
After the iPhone restarts you'll notice a new Loader application on your Springboard. Press to launch it.

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Step Nine
Press to select Cydia then press the large Install Cydia button that appears.

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Step Ten
Once Cydia has installed successfully you can remove Loader by pressing the Options button then the large red Remove Loader.app button.

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Step Eleven
Restart your iPhone then run Cydia. Let it do all the necessary updates.

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***A big thanks goes everyone who made this jailbreak possible.
 

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