Join Family Sharing as a family member on Mac
If you haven’t joined a Family Sharing group, you can join the group when the family organizer adds you or when you accept an invitation. See Join a Family Sharing group in Family Sharing on Mac.
After joining a family, you can change your Family Sharing settings. You can change the Apple ID you use to share your purchases with your family, or you can stop sharing your purchases. See Share purchases with others in your Family Sharing group. You can also choose whether each family member can see the location of your devices. See Stop sharing your location with others in your Family Sharing group.
For information about the settings you can change as the family organizer, see Manage a Family Sharing group on Mac.