Thunderbird - Older Versions Of

: Often seen as the last "classic" version before the major Supernova visual overhaul.

| macOS Version | Max Thunderbird | | :--- | :--- | | OS X 10.9 Mavericks | Thunderbird 52.9.1 | | macOS 10.12 Sierra | Thunderbird 78.14.0 | | macOS 10.13 High Sierra | Thunderbird 91.x (partial) | older versions of thunderbird