![macOS Monterey to Support All-New Mail App Extensions, Plug-Ins Will Stop Functioning in Future Release - MacRumors macOS Monterey to Support All-New Mail App Extensions, Plug-Ins Will Stop Functioning in Future Release - MacRumors](https://images.macrumors.com/t/lFsPLbi8DAYhQgBICsyQFEBKwVw=/1200x1200/smart/article-new/2021/06/mail-app-extensions-macos-monterey.jpg)
macOS Monterey to Support All-New Mail App Extensions, Plug-Ins Will Stop Functioning in Future Release - MacRumors
![Mail plugin is not supported for Mail 15.0 (macOS 12 Beta) · Issue #777 · altstoreio/AltStore · GitHub Mail plugin is not supported for Mail 15.0 (macOS 12 Beta) · Issue #777 · altstoreio/AltStore · GitHub](https://user-images.githubusercontent.com/69256931/121534318-056cfb00-c9f9-11eb-9ab7-fa9114b84e6d.png)
Mail plugin is not supported for Mail 15.0 (macOS 12 Beta) · Issue #777 · altstoreio/AltStore · GitHub
![mail.app - System alerts and Mail in Mojave are no longer playing any alert or notification sounds - Ask Different mail.app - System alerts and Mail in Mojave are no longer playing any alert or notification sounds - Ask Different](https://i.stack.imgur.com/1z0fN.png)
mail.app - System alerts and Mail in Mojave are no longer playing any alert or notification sounds - Ask Different
![HELP] macOS 10.15.3: Cannot install Mail Plug-in. Also Missing Manage Plugins under Mail > Preferences : r/AltStore HELP] macOS 10.15.3: Cannot install Mail Plug-in. Also Missing Manage Plugins under Mail > Preferences : r/AltStore](https://i.redd.it/9xcifp7f1zg41.png)