My Calendar adding duplicate appointments
Why is my Calendar adding a duplicate appointment?
[Re-Titled by Moderator]
Original Title: Duplicate appointments
iMac 24″, macOS 26.5
Use the color of the event to see which Calendar it is assigned to. If you have Siri Suggestions checked in the Sidebar, it will pull suggested appointments from Messages or Emails, but you can turn those off by clicking the checkmark. If it is a Reminder, then when you tap on the Event, then Scheduled Reminders will be selected in the Sidebar and you can uncheck that too if you don't want those to appear.