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need help migrating old TB data from McBkPro 10.6.8.to McBkPro 10.10.5 .... what folder should I copy over from the old HD to "import" from using the new TB?

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Ive been using Thunderbird on an older Mac Book Pro (running 10.6.8) for a long time. Now I've purchased a newer Mac Bk Pro (running 10.10.5) and I need to migrate my old Tbird data (contacts, trash, sent etc...) to my new system. I just downloaded the newest version of Tbird and I see the import option at the top but when I go to the Tbird file from the old mac, it grey. What folder from my old mac do I need to have available on the new mac to import my old data? Thank you.

Ive been using Thunderbird on an older Mac Book Pro (running 10.6.8) for a long time. Now I've purchased a newer Mac Bk Pro (running 10.10.5) and I need to migrate my old Tbird data (contacts, trash, sent etc...) to my new system. I just downloaded the newest version of Tbird and I see the import option at the top but when I go to the Tbird file from the old mac, it grey. What folder from my old mac do I need to have available on the new mac to import my old data? Thank you.

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copy the ~thunderbird library folder and all it contains from the old machine to the new then start Thunderbird