Mail.app plugin compatibility for macOS Sierra (10.12)

Posted: July 27th, 2016 | Author: | Filed under: macOS, Mail, Programming | Tags: , , , , , , , , , | No Comments »

 
Mail.app in macOS 10.11 and earlier used to check the plugins compatibility using the SupportedPluginCompatibilityUUIDs key in the plugin’s Info.plist. For example a Mail plugin would only be compatible with macOS 10.11.6 if its Info.plist contained the following:

<key>SupportedPluginCompatibilityUUIDs</key>
<array>
   <string>71562B89-0D90-4588-8E94-A75B701D6443</string>
</array>

  
Mail.app version 10.0 in macOS Sierra (10.12) now uses a different key to check the plugins compatibility. It now requires a key with the format Supported%ld.%ldPluginCompatibilityUUIDs where “%ld.%ld” is the operating system version like “10.12”.

If you want to make your Mail.app plugin compatible with macOS Sierra, you will need to add a key in your Info.plist like:

<key>Supported10.12PluginCompatibilityUUIDs</key>
<array>
    <string>36CCB8BB-2207-455E-89BC-B9D6E47ABB5B</string>
</array>

Note that the UUID “36CCB8BB-2207-455E-89BC-B9D6E47ABB5B” is for macOS Sierra 10.12 beta 3.

  
Also by default the Mail plugins support is disabled. In order to enable it you first need to run in the Terminal the following:

defaults write com.apple.mail EnableBundles -bool true

  
Related post: Disable swipe to delete in Mail.app on OS X 10.11