Download Letter Opener Pro for OS X Mail

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The current version requires OS X 10.10 Yosemite or later, but you can download the last compatible version of Letter Opener Pro.

Download Version 7.0.5

Upgrade to OS X El Capitan for free.

Visit the OS X El Capitan page on the Mac App Store. Click the download button, and follow the onscreen instructions to begin your upgrade.

The current version requires OS X 10.10 Yosemite or later, but you can download the last compatible version of Letter Opener Pro.

Download Version 6.0.7

Upgrade to OS X El Capitan for free.

Visit the OS X El Capitan page on the Mac App Store. Click the download button, and follow the onscreen instructions to begin your upgrade.

Version: 8.0.7 released on: March 22, 2016
Compatible: OS X El Capitan (Mail 9.3) and OS X Yosemite

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Older Versions:

OS X Version 8 Version 7 Version 6 Version 5 Version 4
10.11 El Capitan Intel
10.10 Yosemite Intel Intel
10.9 Mavericks Intel Intel
10.8 Mountain Lion Intel Intel
10.7 Lion Intel Intel Intel
10.6 Snow Leopard Intel Intel Intel
10.5 Leopard Intel
10.4 Tiger
Download 7.0.5 Download 6.0.7 Download 5.1.2 Download 4.0.5
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Double-click the Letter Opener Installer in Downloads

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Follow the Installers instructions

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Open OS X Mail application