Apple Calendar Server on a Mac
Migrate the old macOS Server CalDAV · Calendars
macOS Server's Calendar & Contacts service (the open-source CalendarServer/caldavd) is discontinued. Its data lives at /Library/Server/Calendar and Contacts/; config in Config/caldavd.plist, calendars stored as .ics collections under Data/. The calendars export cleanly to any modern CalDAV server (Radicale, Baïkal, Nextcloud) by copying/importing the .ics files; the server settings (ports, auth realm) don't map 1-to-1, so you reconfigure those in the new server.
Run Apple Calendar Server with FrontierStack
Install or connect Apple Calendar Server; then check its status, ports and certificate from FrontierStack. The same screen links to firewall checks, Malware Audit and backups where they apply.
Run it from your Mac.
FrontierStack installs, monitors and secures services on this Mac and on linked servers.
Download FrontierStackApple notarized · Safe & secure · macOS 13 Ventura+