Thunderbird for mac 10.5.81/5/2023 ![]() ![]()
If you’re running Snow Leopard (10.6.8) or Lion (10.7) and your Mac supports macOS High Sierra, you will need to upgrade to El Capitan first. How do I upgrade my Mac from 10.6 8 to High Sierra? To upgrade to El Capitan you must have Snow Leopard 10.6.8 or Lion installed. El Capitan can be downloaded from the Mac App Store for FREE. You can upgrade to El Capitan from Lion or directly from Snow Leopard. How do I upgrade from Snow Leopard to El Capitan? ![]()
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