my family member wants to add their number to their new Apple ID on their MacBook but there is a message the the phone number is already in use with another account
my family member wants to add their number to their new Apple ID on their MacBook but there is a message the the phone number is already in use with another account. How do I fix this? My son has his own Apple ID and family sharing but he wants to use message on his computer. i want to remove a number that I can be reached at in my iCloud account.