06.14.2023
With macOS Monterey in 2021, Apple introduced a MailKit framework that developers can use to build modern and secure extensions for the Mail app on the Mac. Extensions can be
In turn, Apple said legacy Mail app plug-ins would stop functioning in a future macOS release, and it appears that time has now come. AltStore today said it confirmed with Apple during WWDC last week that plug-ins are not supported on macOS Sonoma, and that MailKit-based extensions are the only supported solution going forward.
PSA: Confirmed in WWDC labs that legacy Mail plug-ins are NOT supported on macOS Sonoma. MailKit-based extensions are the only supported method going forward.
— AltStore.io (@altstoreio) June 14, 2023
AltServer's Mail plug-in will no longer work once you update, but we're working on a new method we hope to release soon.
While MailKit extensions are more secure, they have more limited functionality compared to legacy plug-ins, so not all plug-ins may live on as extensions.
Legacy plug-ins cannot be opened in the Mail app as of the first beta version of macOS Sonoma. The update will be released to the public later this year.
(Thanks, @aaronp613!)
Related Roundup: macOS Sonoma
Tag: Apple Mail
This article, "macOS Sonoma Drops Support for Legacy Mail App Plug-ins" first appeared on MacRumors.com
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