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Mac laptop won't pass upgrade requiremt even though it's OS 10.5.6 and has 512 MB
laptop meets upgrade requirements, yet firefox says it does not
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PPC Mac's aren't compatible with the Firefox 4+ versions, they require Intel architecture.
For older Macs that aren't supported in Firefox 4+ versions, try TenFourFox for PowerPC's running Mac 10.4.11 & 10.5.8 .
http://www.floodgap.com/software/tenfourfox/
http://www.mozilla.org/en-US/firefox/4.0/system-requirements/
to http://www.mozilla.org/en-US/firefox/8.0/system-requirements/
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
Firefox 3.6.* and earlier used to come with Intel and PPC versions in download, but now as of Firefox 4.0 and newer (including 8.0) the PPC version was replaced with 64-bit version.
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