I would like to have some additional calendars that are not synced through iCloud on one of my computers. I have been using this calendar to run small programs at certain times. These programs are however only (a) available on this one machine and (b) would not even be allowed on e.g. an iPad.
As I am currently forced to sync the calendar to all my devices however my iPad is turning the custom alerts into normal standard alerts. Breaking the entire calendar.
Is there a way around this? Thanks!
A co-worker figured this one out for us:
In Calendar, go to Calendar: Accounts, select your accounts you are using in Calendar and uncheck "calendar" from the section where it says "Use With".
Once there are no internet accounts available, Calendar will allow you to set up an "On My Mac" local calendar.
Once that's set up, re-check the "Use With: Calendars" checkbox and all should be well.
Caveat: for us, we were able to check and uncheck this setting without having to set anything up again. I won't guarantee this will be the case for you, so be sure you know how to set up your accounts again and as always, have backups.
There's another easy workaround to this.
I've managed to do this (by accident). I created an exchange account that does not work but is still on the Mac as an account. I now can create local calendars under this in the calendar app and use them to launch applications etc. Seems to work well so far and does not sync to iCloud or any other devices.
This answer in another thread seems to be the safest way to do it since you don't have to uncheck/disable any iCloud calendars to set up a local one (and still works under Catalina).
As a summary: in the Calendars-Sidebar click in the Other-section (where Birthdays and Holidays are displayed). Select New Calendar, this one will be created "on your mac". This category is displayed at the top of the sidebar.
