I want to change the name of one of the devices connected through my AppleID

michaelfromdunlop Said:

"I want to change the name of one of the devices connected through my AppleID: My 2010 iMac has acquired the name <Name> MacBook Pro and I want to rename the device"

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Give it a Few:

The change of what is seen on your Apple ID is not instantaneous to changing name of the device. So, give it a few days - it will all sync as it should, by name of the device.

In addition, you will want to remove the incorrectly named device.

see > Check your Apple ID device list to see where you're signed in - Apple Support