Leave Family Sharing
You can remove yourself from a family at any time. After you leave a family, you may be able to join or set up another family. However, you may only join two families per year. (Rejoining a family or creating a new one counts against this limit.)
Tip: Instead of leaving Family Sharing, family members can unsubscribe by deleting the shared Calendar, Reminders, and Photo album and still have access to other family sharing services.
You can’t remove yourself from a family if you’re under 13 (age varies by country or region). However, the family organizer can move a child to another group using Family Sharing.
Choose Apple menu > System Preferences, then click iCloud.
Choose Manage Sharing, click your name on the left, then click the Remove button
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If you leave the family, you keep purchases paid for using the shared credit card, but you immediately lose access to other things the family shares.
Other family members’ items no longer appear in the Purchased section of the iTunes Store, App Store, and iBooks Store.
DRM-protected music, movies, TV shows, books, and apps you previously downloaded are no longer usable if someone else originally purchased them. Other family members can no longer use DRM-protected content downloaded from your collection.
In-app purchases become unavailable if you bought them using an app someone else originally purchased. You can regain access to the in-app purchases by purchasing the app.
The family members’ photos album, calendar, and reminder list are removed from your devices.
Family members’ device locations don’t appear when you use Find My iPhone on iCloud.com or on your iOS devices.
For information about leaving Family Sharing using an iOS device, see the Family Sharing section of the user guide for iPhone, iPad, or iPod Touch.