You are a long-time MiniKeePass user. You have been using it daily for many years, and it just worked. But today it does not open and shows a scary message instead:
Unable to Install MiniKeePass. The app is no longer available in the App Store.
Developers and early adopters can now test KeePassium on macOS Big Sur.
KeePassium on macOS Big Sur
This is a universal app built with Mac Catalyst; it runs both on Apple Silicon and Intel processors. MacOS version uses the same code base as the iOS app, with a few cosmetic adjustments. It still looks like an iPad app, but this will improve as the app evolves.