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I downloaded and dragged to Applications but got message " Can't open because firefox is not supported on the architecture. Did I download the wrong version?


I am on a Mac 10.5 and downloaded from your website, but get the following message when I try to open Firefox. "Can't open application "Firefox" because it is not supported on the Architecture". Am I doing something wrong, or did I download too new a version?

Additional System Details


  • User Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-us) AppleWebKit/523.10.3 (KHTML, like Gecko) Version/3.0.4 Safari/523.10

More Information

  • Top 10 Contributor
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2042 solutions 8887 answers

hello, please see Firefox no longer works with Mac OS X 10.5

  • Top 25 Contributor
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437 solutions 3146 answers

Helpful Reply

As of Firefox 17.0 and newer one needs both a Intel and at minimum OSX 10.6.

Question owner

I downloaded Firefox 16 and got the message "Mounting Failed". Is this still the wrong version? Could there be something wrong with my computer. I REALLY hate Safari, and can't wait to get Firefox going. Please Help!

Question owner

Anybody out there? I'm still waiting for an answer from 2/10. What does "Mounting Failed" mean and what can I do about it?

  • Top 10 Contributor
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10743 solutions 96657 answers

Helpful Reply

Can you first confirm that you are running Mac OX 10.6.8 or later?