Jailbreak iPhone 3GS, iPhone 4 Using GreenPois0n RC5 Untethered Jailbreaking Tool for iOS 4.2.1 [Mac]

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on February 4, 2011

Earlier today, we reported that the Chronic Dev-Team has released GreenPois0n RC5 untethered jailbreak tool for iOS 4.2.1 (iOS 4.1 also supported), now we’re putting up instructions on how to jailbreak your iPhone 3GS and iPhone 4 with Greenpois0n RC5 for Mac, courtesy of iClarified.

Important:

Greenpois0n recommends a clean restore before continuing. Do not update to iOS 4.1 or iOS 4.2.1 if you need the unlock. Ultrasn0w does not support that baseband yet. The only exception is the iPhone 4. You can update to iOS 4.2.1 without upgrading your baseband by using TinyUmbrella. Start TSS Server->Start iTunes->Plug in your iPhone->Restore 4.2.1->Error 1013->Put phone into DFU Mode->Launch Greenpois0n.

Step One
Launch your web browser and go to www.greenpois0n.com. Click the Mac link at the bottom of the screen.

Step Two
Upon prompt, save the greenpois0n-osx_rc5.zip file you want to download on your desktop. Extract the files and launch the greenpois0n application.

Step Three
Now power off your iPhone 3GS or iPhone 4 and connect it to the computer. Once connected, click the large Jailbreak button

Step Four
Greenpois0n will now tell you how to place your iPhone into DFU mode, after which you will be asked to press and hold the sleep button for 3 seconds.

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

You may release the sleep button but keep holding the Home button. Do not release the Home button at this point!.

Step Five
The jailbreak begins once your iPhone is successfully in DFU mode.

Step Six
You may release the Home button once Greenpois0n informs you that it has completed the jailbreak. Clicking the Complete button will close the application on your computer. You will notice some verbose mode text scrolling on your device.

Step Seven
After the iPhone restarts you will also notice a new Loader application on your Springboard. Tap on it to launch it.

Step Eight
After launching Loader application, select Cydia and then press the large Install Cydia button that appears.

Step Nine
You may remove Loader by pressing the Options button then the large red Remove Loader.app button once Cydia has installed successfully.

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

And Voila! There you have it, an untethered jailbreak on your iPhone running iOS 4.2.1 using Greenpois0c RC5 for Mac.

Did you find this tutorial helpful? Experienced any issues in the process? Let us know in your comments below!

  • Poopoo2

    once it starts loading it just stops and has an error =[

    • Erem

      Same thing. Then I retried and it worked.

  • Poopoo2

    once i start downloading cydia it stops and says connection error or it has the NSURLErrorDomain error – 1100 OR when it hit loader nothing pops up =

  • Ctfvgbjhnk

    My Loader doesn’t work? =(

    • jvelasco

      After Greepois0n…
      Use reds0wn 0.9.7b6 for iPhone 4 to install Cydia or redsn0w 0.9.6rc8 for 3GS

      • Noutheretik

        i did it and after reboot the iphone i stil can’t see the loader app.. i tried the other solution by the terminal.. and terminal say no such files or directory.. i m quiet lost about what to do more, thx for your eventual help

  • http://www.myvouchercodes.co.uk online shopping uk

    I have Gone Through it but it is not working at my site, once its start downloading from cydia app then it gives error..

    • jvelasco

      Loader ver slow… use:
      After Greepois0n…
      Use reds0wn 0.9.7b6 for iPhone 4 to install Cydia or redsn0w 0.9.6rc8 for 3GS

  • chris

    Tried 4 times. Got a loader app that didin’t do anything once, greenpois0n crashed twice and got no loader app once. Fail.

  • Hairlessheart

    Greenpois0n completes, but phones just reboots and there’s no loader icon!

    This happened over and over with me. First with RC1, GP would say ‘complete’, but nothing would have worked. With RC2, instead of saying ‘complete’, it said ‘Failed’. I managed to get it to finally work by doing this;

    1. Connect iphone to computer. Turn it off in usual way and close iTunes.
    2. Open “terminal”, type SUDO, open Greenpois0n as “Show package contents”, go MacOS folder & drag greenpois0n to terminal & hit enter. This will show some logs and will open the Greenpois0n program.
    3. Follow the GP instructions as normal. I kept holding the home button at the final stage until GP finally said complete. This may be overkill, but it seemed to work. As GP is running, you’ll see lots of logs appearing in the terminal window.
    4. The screen on the iPhone will go white temporarily, the go lack and lots of logs will appear.
    5. It will reboot a couple of times, with the animated GP logo.
    6. Success!

    Hope this helps anyone who was having the same issues I was.

    Cheers

    • jnp

      AHAH! Thanks Hairlessheart! I had the same issue… GP kept saying complete but reboot just showed apple logo and no Loader app. Your suggestion worked though!

  • Stevenkoh04

    when i type sudo and drag the greenpois0n from mac os folder it show “no such directory”

    • Noutheretik

      me too ! damnit !

  • Restequi

    Awesome Dude!! Rock on!!

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