How do I handle that the contact app is having duplicates contact card of my own profile,(Believe it has something to do with me being the user of one Macbook,iMac's and also one iPad? Is it possible to set it as one card? I do not use the directory

orjaneknes wrote:

How do I handle that my contact app is having duplicates contact card of my own profile,(Believe it has something to do with me being the user of one Macbook, 2 iMac's and also one iPad? Configurated with me *** a single admin user on all devices, the guest account is turned off? Is it possible to set it as one card? I do not use the directory untillity?

did you try from the Contacts>Help menu...

ref: Merge contact cards in Contacts on Mac - Apple Support