
Would like to download Thunderbird/I am running osx10.5.8 on PowerBook G4/ is there a compatible version of Thunderbird?
Feel the need to upgrade my email.
Chosen solution
https://support.mozilla.org/en-US/kb/firefox-no-longer-works-mac-os-10-4-or-powerpc
Since you have a PPC or PowerPC instead of a Intel system the version of official builds of Firefox and Thunderbird you can run on a PPC are rather old and vulnerable. For Intel users using OSX 10.5.x the last Thunderbird and Firefox version to work was 16.0.2.
There has been a third-party option for Firefox users on PPC systems for some years now at http://www.floodgap.com/software/tenfourfox/
There is also or was a Thunderbird option for PPC at https://tenfourbird.osdn.jp/
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Chosen Solution
https://support.mozilla.org/en-US/kb/firefox-no-longer-works-mac-os-10-4-or-powerpc
Since you have a PPC or PowerPC instead of a Intel system the version of official builds of Firefox and Thunderbird you can run on a PPC are rather old and vulnerable. For Intel users using OSX 10.5.x the last Thunderbird and Firefox version to work was 16.0.2.
There has been a third-party option for Firefox users on PPC systems for some years now at http://www.floodgap.com/software/tenfourfox/
There is also or was a Thunderbird option for PPC at https://tenfourbird.osdn.jp/
Modified