Identify and remove unwanted devices from your Apple ID

>>> From MacBooks to HomePods, Apple knows every device that you connect to your Apple ID, so it’s really important to check the list in Settings or System Preferences > Apple ID from time to time. You should remove any devices that you no longer have: many of Apple’s products are limited to a maximum number of authorized devices.

There’s another reason to check your connected devices, and that’s to ensure no mystery devices also have access to your account. If there’s a device you don’t recognize, make sure you kick it out and change your passwords immediately.