Question :
I am using an online service that can set all appointments I have with them in my Google Calendar… but not in my Apple Calendar… and even though I have a Gmail-account, I never use Google Calendar…

Is there any way to sync or transfer the Google Calendar appointments into my Apple Calendar on iOS and macOS ?

Answer :

YES there is ! And it’s rather simple, but you have to enable your Google Calendar :
– on the online service’s website, click on the ADD TO CALENDAR (or similar) option
– let them set the appointment in your Google Calendar (you might have to login with your Gmail account for that)
– then, on iOS (on your iPhone), open the Settings.app
– scroll down to “Calendar” and click on the triangle on the right
– in the Calendar Settings page that opens, go to “Accounts” and click on the triangle on the right
– in the Accounts page that opens, under ACCOUNTS, go to your Gmail address and click on the triangle on the right
– then, on the settings page of your Gmail account, go to “Calendars” and make sure that the slider is ON (Green)
– then exit the Settings.app
– now, on macOS (on your Mac), open the Calendar.app
– then, in the top menu bar, click on “Calendar” and select “Accounts” from the pulldown menu
– now, in the “Internet Accounts” window that opens, click on your Gmail account’s Gmail address
– in the Gmail account’s settings page that opens, make sure taht at “Calendars” the slider is set to ON (Blue)
– then exit the Settings
– now, in the Calendar.app, you will see the appointments from your Google calendar appear
– then, click on the calendar icon on top of the menu list on the left so all your different calendars are listed on the left
– now, scroll down to the chapter the has the name of your Gmail account, and uncheck (deactivate) the Birthdays, Family and Holidays options (these are the presets from Google Calendar)
– if needed, you can also change the color of the Google Calendar appointments by right-clicking on your Gmail address (that is your main Google Calendar) and selecting a preset or custom color
– if needed, you can also choose “Get Info” from the popup menu to change the name (“Description”) of the calendar or the alerts or how thes appointments effect your availability (as seen by others with whom you share your Calendar/appointments)

That’s it !

enjoy 😉