Reinstall Mac Calendar. Create separate calendars for different areas of your life—work, home, school, and so on. When you see the confirmation dialog, click the reset button again to reset the mail and calendar.
On the storage usage and app reset page, click the reset button. Navigate to apps > apps & features.
Select Restore Next To The.
When you see the confirmation dialog, click the reset button again to reset the mail and calendar.
Select File ≫ Office Account ≫ About Outlook.
Look for com.apple.mail.plist and drag it the desktop, then restart mail.
Each Calendar Has Its Own Color.
Images References :
Each Calendar Has Its Own Color.
Scroll down to the bottom of the window, then select data recovery.
Select File ≫ Office Account ≫ About Outlook.