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.

Search Support

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

Tried to update from 3.xto 4 on PowerPC G4 Mac,says not supported,so now have NO Firefox.

  • 1 reply
  • 8 have this problem
  • 4 views
  • Last reply by cor-el

more options

Downloaded 4.o from website to replace my 3.x on my PowerPC G4 Mac. It offered an icon to move into Applications folder that had a circle with slashing line across it. I (perhaps foolishly) moved that to Applications folder, which wiped out 3.x version. Now, this new but not working Firefox file gives an "Application Not Supported" warning when I try to open it. Thus, no Firefox, and retrying download didn't help.

Downloaded 4.o from website to replace my 3.x on my PowerPC G4 Mac. It offered an icon to move into Applications folder that had a circle with slashing line across it. I (perhaps foolishly) moved that to Applications folder, which wiped out 3.x version. Now, this new but not working Firefox file gives an "Application Not Supported" warning when I try to open it. Thus, no Firefox, and retrying download didn't help.

All Replies (1)

more options

Firefox 4 requires at least OS X 10.5 and an Intel Mac.

For Mac OS X 10.4.11 or Mac OS X 10.5.8 you can look at:

Firefox 3.6.x can be found here: