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
FrontierStack lists Apple Calendar Server in its Calendars catalog. Install or connect it from one place, then monitor its status, ports and certificate, secure it with the firewall and Malware Audit, and back it up.
Run it all from one Mac app.
FrontierStack installs, monitors and secures the whole stack — locally and across your fleet — from a single native macOS app.
Download FrontierStack