Swift 4.0 Eventkit Cannot get calendars and events correctly

Question

I\'m trying to use Eventkit to access Mac Calendar. Access is successfully requested but I keep getting nil or an empty array of calendar or events, even though I have several c

Answer 1

After lots of trial and error, I found the answer.

You need to set the com.apple.security.personal-information.calendars key to YES in your entitlements file, even if your app is not sandboxed. There is a bug in Apple's implementation of EventKit that prevents your app getting access to calendars if it does not set this key, even if the sandbox is disabled.