Remove duplicate events from macOS and iOS calendars
Remove Duplicate Calendar Events
Sometimes the calendar apps in macOS and iOS show duplicates of some of your events. This utility removes the duplicates. For any events in a calendar with identical identifies, it removes all but one. The utility ignores events with recurrences.
Usage
To show which calendar events would be removed, from Terminal run:
$ ./rdce
To actuall remove duplicate calendar events, from Terminal run:
$ ./rdce --remove