Starting with Thunderbird version 52, Thunderbird requires Mac OS X 10.9 (Mavericks) or higher. If you are on an earlier version of Mac OS X, there are options for you to continue using a secure version of Thunderbird.

Visit this Apple Support page to find your Mac OS version.

To ensure the safest email experience, we recommend upgrading to a Mac OS version that Apple supports. Visit this Apple Support Page to learn more about upgrading.

While Thunderbird will still continue to work on unsupported versions, using Thunderbird on a supported version will provide you with the best and safest user experience.

Mozilla Thunderbird Download Mac Os X

Thunderbird 45 will continue to work with Mac OS X 10.6, 10.7 and 10.8 but will not receive any further updates or security fixes. Thunderbird 45 can be downloaded from here. First pick the folder for your locale and then download the package.

Thunderbird For Mac Reviews

Mac users interested in Thunderbird email for mac osx 10.6.8 generally download: Thunderbird 78.2 Free As of July 2012, Thunderbird has transitioned to a new governance model. Download and Install Thunderbird Use your web browser to visit the Thunderbird download page at This page detects your computer's operating system and language, and it recommends the best version of Thunderbird for you to use.