Download Greenpois0n RC5 to Jailbreak (Untethered) iOS 4.2.1 on All iDevices

Wait is over now. Chronic Dev Team has finally released the Greenpois0n RC5 update to support the untethered jailbreak on iOS 4.2.1.

According to Joshua Hill aka @p0sixninja over Twitter, the current update is for Mac users only but Windows based version of Greenpois0n RC5 will be released soon.

p0sixninja: Windows version soon after (macosx version is beta) …more packaging, less talking

Download: [See the Update below for latest version]

  • Download Greenpoison RC5  for Mac OS X [Direct link 2] [Official Site is Here]
  • Download Greenpoison RC5-2 for Mac OS X [Mirrors: Link 1, Link 2, Link 3] (Greenpois0n RC5-2 is an updated version with some bug fixes)
  • Download Greenpois0n rc5 for Windows (coming soon)
Greenpoison RC5 Windows version is now available for download. Grab it from here.

The complete step by step guide to jailbreak iOS 4.2.1 untethered on iPhone 4, iPhone 3GS, iPhone 3G, iPad and iPod Touch is coming soon here.

Stay tuned to this site for more information about (Untethered) Jailbreak on iOS 4.2.1, iOS 4.3 and iOS 4.2.6.


Greenpois0n RC 6 is now available for both Windows and Mac OS. You can download these versions from our this post.

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Updated 12 years agoCategorized as Jailbreak

By A. Usman

Loves new tech, especially from Apple and Google.

View all of A. Usman's posts.

10 Replies

  1. Stingersays:

    Should I use Greenpois0n rc5 or rc6 for iOS 4.2.1??

  2. Burningtobysays:

    Great, now my iphone 4 wont start up, just keeps rebooting….untethered my ass!

  3. aiktaisays:

    Greenpoision won’t start. I don’t know wy maybe because I downloaded the newest version of itunes before. Greenposi0n Rc4 started but the newest not. Does anybody has the same problam and knows the sollution?

    1. Which Mac OS X version?? You can get Windows version too now.

  4. Chrissays:

    Windows version first would be nice for once.

    1. Stevesays:

      Considering the iPhone is an Apple product it makes no sense at all to release it on an inferrior OS first. Maybe you should buy a Windows 7 phone?

      1. Billsays:

        Steve, you’re clearly an Idiot. Suck my balls.

    2. Evoospeedsays:

      Win version is more important and why the page is offline

  5. andersonsays:

    I cant download it…it says decompression failed

    1. Use the second link or download from official page.

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