Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox 4 will not work on MAC OSX 10.4.11 - says "not compatible with this version of OS X, what can I do?

  • 1 reply
  • 21 have this problem
  • 11 views
  • Last reply by cor-el

nealemace
nealemace
more options

I have downloaded Firefox 4, put it in Applications, go to start it and get a message "You cannot use the application Firefox with this version of MAC OS X.

I have downloaded Firefox 4, put it in Applications, go to start it and get a message "You cannot use the application Firefox with this version of MAC OS X.

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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: