Thunderbird 3.0 refuses to start on Mac OS X?

Posted by jtimberman on Super User See other posts from Super User or by jtimberman
Published on 2009-12-09T08:08:09Z Indexed on 2010/03/17 13:01 UTC
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I just downloaded Thunderbird 3.0 on my Macbook Pro running Leopard, and installed it in /Applications. When I attempt to start it, the icon opens on the Dock as normal, but I get the following dialog.

Close Thunderbird

I don't have a ~/Library/Application Support/Thunderbird directory at all, let alone a .parentlock file. While I didn't expect it to help, I did reboot my system. And sign out and back in. And close all programs besides Thunderbird.

Earlier versions of Thunderbird have worked just fine.

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