Mobile People News - macOS 14 Sonoma drops support for legacy Mail plug-ins

Mail app in macOS had support for plug-in and many professional users were relying on these plug-ins to manage their incoming and outgoing mail.

Apple introduced MailKit allowing developers to build Mail extensions as a replacement for legacy plug-ins. As of now, several projects are still using plug-ins. These plug-ins will stop working with update to macOS 14 Sonoma.

Some developers already started the migration to Mail extensions.

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.

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.
— AltStore.io (@altstoreio) June 14, 2023

https://twitter.com/altstoreio/status/1669046033941159938

Apple Developer: MailKit

References:

Recommendations

Developer:

Get familiar with MailKit, consider migration approach if applicable.

QA engineer:

Business as usual.

PM/DM:

Consider migration to MailKit if Mail plug-ins are currently used.

macOS 14 Sonoma drops support for legacy Mail plug-ins

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