MacOS Calendar (macOS, iPhone, iPad) Best free calendar app for Apple users. Not sure where to. If you also use a Mac in addition to a PC, you may need to transfer your Microsoft Outlook contacts and calendar from the PC to your Mac. Outlook can export your calendar data as an iCalendar file, which Apple iCal can then open. Open Outlook, Click Calendar in the lower-left corner of the Outlook window. Click the Office button, then click Save As. Outlook.com is a free personal email service from Microsoft that doesn't scan your email for the purpose of serving you ads. Automatically file emails and share photos easily.
Calendar User Guide
To share or back up a calendar that’s in the On My Mac section of the calendar list, you can export the calendar’s events, then import them into another calendar or to another computer.
If you use a calendar account, such as iCloud or Exchange, you don’t need to export and import its calendars to back them up or have them appear on your other devices. The account calendars are stored on the calendar service provider’s servers, and are automatically updated on all your devices set up for the same calendar account.
Export a calendar’s events
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In the Calendar app on your Mac, click the calendar’s name in the calendar list.
If you don’t see the calendar list on the left, choose View > Show Calendar List.
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Choose File > Export > Export.
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Choose a location, then click Export.
The events are exported to a calendar (.ics) file.
Export all calendars
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In the Calendar app on your Mac, choose File > Export > Calendar Archive.
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Choose a location, then click Save.
Import events into a calendar
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In the Calendar app on your Mac, if needed, create a new calendar for the events.
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Choose File > Import.
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Select the file with the events, then click Import.
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Choose the calendar to add the events to.
You can also drag a file with events to Calendar. The events are added to the calendar selected in the calendar list.
Sync Outlook And Mac Calendar
Import calendars from an archive file
WARNING: Importing an archive file replaces all of your current calendar information.
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In the Calendar app on your Mac, choose File > Import.
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Select the archive file, then click Import.
Transfer Mac Calendar To Outlook
To merge an entire calendar with another, export the calendar, import it into another calendar, then delete the old calendar.