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I can not open ff4(after installed) with a note you cannot use the application "firefox. app" with this version of Mac OS X.

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  • 5 have this problem
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  • Last reply by cor-el

sungkim100
sungkim100
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I had ff3, but I upgraded to ff4. But in process of upgrading to ff4 I almost 70 times of dragging from ff simbol to applications, I am so tired of repeating it, So I stopped. and as last step I dragged ff simbol from appplication to side ff simbol. Next day I tried re-download over it, But it happen same thing, it says "you cannot use application"firefox. app" with this version of Mac OS X."

I had ff3, but I upgraded to ff4. But in process of upgrading to ff4 I almost 70 times of dragging from ff simbol to applications, I am so tired of repeating it, So I stopped. and as last step I dragged ff simbol from appplication to side ff simbol. Next day I tried re-download over it, But it happen same thing, it says "you cannot use application"firefox. app" with this version of Mac OS X."

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cor-el
cor-el
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  • Top 10 Contributor
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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: