Exporting a calendar on your Mac is beyond easy. Just click on the calendar name you want to download and select “File” “Export” “Export.” Now, choose a location for the file. After you get this done, click “Export.” To download a calendar from iCloud, login into your account, share the calendar. When recurring events are deleted on Google calendar, they still appear on the extension, and there is no way to delete them. If we click on the event pop-up, the Google calendar opens and says that it can't find the event. Had to uninstall this to get rid of a ghost event.
If you publish or share calendars, you may want to refresh them so that others can see your latest changes. Or, if you subscribe to calendars, you may want to check for updates periodically to be sure you have the latest information.
A published, shared, or subscribed calendar has a Share Calendar button next to its name.
In the Calendar app on your Mac, choose View > Refresh Calendars.
Subscribed calendars can be refreshed automatically.
In the Calendar app on your Mac, Control-click the calendar’s name, then choose Get Info.
Click the Auto-refresh pop-up menu, then choose an option.
In the Calendar app on your Mac, choose Calendar > Preferences, then click Accounts.
Select the account, click the Refresh Calendars pop-up menu, then choose an option.
If you choose Push, the account is updated automatically when you make a change on any of your devices that use the same account, or when someone makes a change to a shared calendar in that account.
In the Calendar app on your Mac, Control-click a calendar below On My Mac in the calendar list.
If you don’t see the calendar list on the left, choose View > Show Calendar List. If your calendar list doesn’t have an On My Mac section, your calendars are in an account, such as iCloud.
Choose Get Info, then select “Publish changes automatically.”
If you see a warning symbol next to a calendar you published, shared, or subscribed to, Calendar is unable to connect to the calendar account. Check your internet connection and try refreshing or updating the calendar again.
Also, make sure the calendar hasn’t been deleted or moved. To see the calendar’s web address, Control-click the calendar’s name, then choose Get Info.