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Why am I unable to update from firefox 4.0.1 on mac osX 10.6.8 when my Mac meets the requirements?


I have a Mac OSX (10.6.8) with an 2.8 GHz Intel Core i7 Processor, 16GB 1067 MHz DDR3 memory and 2TB hard drive.

Yet I am unable to upgrade from FireFox version 4.0.1

I can no longer access my YouTube account, and other websites, because I am told the FireFox version I am running is not compatible.

Why am I unable to upgrade to the latest version of FireFox?

Do you just not want Mac owners to run your browser? It seems this is the case as this has been an ongoing issue that should have been resolved already.

Additional System Details

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Every time Firefox opened

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Installed Plug-ins

  • npmnqmp 071303000006
  • RealPlayer Plugin
  • DivX Content Upload Plug-In: Uploads DivX video in your browser!
  • DivX Browser Plug-In: Plays DivX video in your browser!
  • Office Live Update v1.0
  • iPhoto6
  • Coupons Inc., Coupon Printing FireFox Plugin
  • 4.0.60831.0
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site.
  • The Google Earth Plugin allows you to view 3D imagery and terrain in your web browser.
  • Java Plug-In 2 for NPAPI Browsers
  • The Flip4Mac WMV Plugin allows you to view Windows Media content using QuickTime.
  • Version
  • Google Talk Plugin Video Accelerator version:
  • Shockwave Flash 11.1 r102


  • User Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv: Gecko/20061206 Firefox/ VRE Toolbar 1.4

More Information

  • Top 25 Contributor
617 solutions 4263 answers

Firefox 4 versions and later do not run on a PowerPC Mac and require at least OS X 10.5 and an Intel Mac.

Firefox 10.0.2 System Requirements

The latest version for your ppc mac is 3.6.27 you can download from here:


Firefox 3.6 System Requirements

1. Download a new copy of the Firefox program(3.6.27) from the above link

2. Trash the current Firefox application to do a clean (re-)install.

3. Install the new version that you have downloaded(3.6.27).

Your profile data is stored elsewhere in the Firefox Profile Folder, so you won't lose your bookmarks or other personal data.

see also: Installing Firefox on Mac

thank you

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