iCloud superguide
Make the most of iCloud.com
You can access your favorite Apple apps and more at the iCloud website
Remove devices from your Apple ID
To remove a device from your Apple ID — maybe an iPhone you upgraded, or an old Mac — go tohttps://account.apple.com, and sign in. In the left column, click Devices. Click on a device, and in the pop–up window, click “Remove from Account”.