password
do you have to change your password on all three of my devices manual?
MacBook Pro 13″, OS X 10.10
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Yes. Changing the password doesn't sync across devices.
If you have changed your password, have you followed the steps in this article? Make sure you turn of Find My Phone before signing out of the old ID. Once signed out and Find My Phone is off, then sign in with the new ID, then turn Find My Phone back on.
What to do after you change your Apple ID or password - Apple Support. *