All players must perform all future shared actions this round. You select the shared action order.
Q. How does the Sharing apple work?
A. Once the Sharing apple is eaten, all future apples with the shared symbol that are eaten must have their action performed by all players. This effect lasts until the end of the round.
Q. How is the Sharing turn order selected?
A. Player A eats the Sharing Apple and player B then eats the Dark Apple. Player B would perform the Dark Apple action first because they ate the apple. Player A would then choose the order that they and all other players perform the Dark Apple action.