If my calendar data appears to have disappeared after rapidly first appearing, I discovered that Command-zero (command-0) would bring the data back for display on the calendar. However, the next time I launched calendar, I had to do it again. I have no idea what I did to initiate the disappearing data.
[Re-Titled by Moderator]
MacBook Pro 13″, macOS 15.4
If a simple reboot of your Mac doesn’t fix things, see if the problem still happens in safe mode.
How to use safe mode on your Mac - Apple Support
Safe mode will often correct weird software behavior by forcing the OS to clear caches, do disk repair and other self-maintenance and housekeeping and temporarily disables third-party mods.
Does the same thing happen while in Safe mode?
If not, that is an indication that the problem may be related to some third-party software you have installed on your Mac.
You can exit safe mode by restarting your Mac normally, then reevaluate the problem.
If a simple reboot of your Mac doesn’t fix things, see if the problem still happens in safe mode.
How to use safe mode on your Mac - Apple Support
Safe mode will often correct weird software behavior by forcing the OS to clear caches, do disk repair and other self-maintenance and housekeeping and temporarily disables third-party mods.
Does the same thing happen while in Safe mode?
If not, that is an indication that the problem may be related to some third-party software you have installed on your Mac.
You can exit safe mode by restarting your Mac normally, then reevaluate the problem.
How do I fix disappearing calendar data on MacBook Pro?
