Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

ابحث في الدعم

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

I'm on a Mac OS X 10.5.8 and i loaded firefox 7 and now it keeps telling me that we are not compatible with this architecture.

  • 1 (رد واحد)
  • 3 have this problem
  • 5 views
  • آخر ردّ كتبه cor-el

more options

I had Firefox 7 loaded on the computer and now it tells me we are not compatible.

Now when i go to the Firefox website, I get this reply:

Unfortunately the latest version of Firefox isn't compatible with your computer's operating system. Learn more.

I had Firefox 7 loaded on the computer and now it tells me we are not compatible. Now when i go to the Firefox website, I get this reply: Unfortunately the latest version of Firefox isn't compatible with your computer's operating system. Learn more.

All Replies (1)

more options

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.

For an unofficial Firefox 7 compatible version (TenFourFox) that runs on PowerPC Macs with OS X 10.4.11 or OS X 10.5.8 you can look at:

Firefox 3.6.x (Mac OS X 10.4 and later) can be found here: