If you are running the Unread for macOS beta on the beta version of Sequoia (macOS 15) that Apple released today, you will get an alert when launching Unread with this text:
“Unread.app” would like to access data from other apps.
Keeping app data separate makes it easier to manage your privacy and security.
You will need to click the Allow button on that prompt in order for Unread to work as expected.
Unread is not sharing any data with other apps, but I believe there is something I need to update around the app’s provisioning profiles. I will do so as soon as possible.