Firefox says my operating system doesn't support upgrade. I have MAC OS X 10.5.6
When I tried to download the latest Firefox version, a message said that my operating system doesn't support the upgrade. But the information on download page says MAC OS X 10.5 or better is okay. My system is MAC OS X 10.5.6
Chosen solution
by cor-elDo you have a Intel processor or a PowerPC processor as your user agent suggests and Mach-O would indicate an even older OS X version than 10.5 (possibly OS X 9).
- Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3
Are running Firefox in some compatibility mode via Rosette?
See:
- https://support.mozilla.com/kb/Websites+or+add-ons+incorrectly+report+incompatible+browser
- http://kb.mozillazine.org/Resetting_your_useragent_string_to_its_compiled-in_default
- Firefox 4 versions and later do not run on a PowerPC Mac.
- Firefox 4 and later require at least OS X 10.5 and an Intel Mac.
- http://www.mozilla.com/firefox/6.0/system-requirements/
Additional System Details
This happened
Just once or twice
This started when...
I tried to upgrade my Firefox browser
Installed Plug-ins
- Shockwave Flash 10.0 r45
- Runs Java applets using the latest installed versions of Java. For more information: Java Embedding Plugin. Run version test: Test Your JVM.
- Netscape Navigator Default Plug-in
- The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site.
- Verified Download Plugin
- Macromedia Shockwave for Director Netscape plug-in, version 10.1.1
Application
- User Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3
More Information
Chosen Solution
Do you have a Intel processor or a PowerPC processor as your user agent suggests and Mach-O would indicate an even older OS X version than 10.5 (possibly OS X 9).
- Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3
Are running Firefox in some compatibility mode via Rosette?
See:
- https://support.mozilla.com/kb/Websites+or+add-ons+incorrectly+report+incompatible+browser
- http://kb.mozillazine.org/Resetting_your_useragent_string_to_its_compiled-in_default
- Firefox 4 versions and later do not run on a PowerPC Mac.
- Firefox 4 and later require at least OS X 10.5 and an Intel Mac.
- http://www.mozilla.com/firefox/6.0/system-requirements/
Question owner
Thanks for your response--now I understand. Yes, my Mac is an older PowerPC Mac. I've upgraded Firefox to 3.6.20 and it's working fine. Not gonna buy a new Mac in this economy, ya know? I appreciate your help. Aloha from Hawaii.
You're welcome
For an unofficial Firefox 4 compatible version (TenFourFox) that runs on PowerPC Macs with OS X 10.4.11 or OS X 10.5.8 you can look at: