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Will FireFox4 work with a MacPro Book 10.4.11?

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I down loaded and had problem opening it. It said firefox4 could work with this OS.

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No, Firefox 4 needs 10.5 or higher.

Mac Operating Systems

  • Mac OS X 10.5
  • Mac OS X 10.6

Recommended Hardware

  • Macintosh computer with an Intel x86 processor
  • 512 MB of RAM
  • 200 MB hard drive space