I divorced my wife. I need to unlink her Macbook air from my Macbook air

archie1709 Said:

"I divorced my wife. I need to unlink her Macbook air from my Macbook air: currently, my wife's macbook air is linked to my apple account. So what she saves on her desktop I see on my desktop. How can we please unlink both macbooks? What do I do on mine, and what does she do on hers?"

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Troubleshooting an Accessed Account:

Seems this person has access to your account. So, remove all devices from it.

A. Re-Associate All Devices:

Disassociate all devices from your Apple Account, first.  Sign out of iCloud on all of your devices.. Go here to check the devices associated to your account: Check yourApple ID Device list to See where you're Signed in - Apple Support. Then, log in to your Apple iCloud Account on each device.

B. Verify Your Devices:

Verify that your the devices logged in to your account or officially yours, by using this link: Check your Apple ID Device List to See where you're Signed in - Apple Support

C. Consider Modifying your Credentials:

By all means, consider modifying your credentials, starting with a new password.

• Modify: your login credentials (Using Both a New eMail and a New Password for each and all sites)
• Associate: a different method of payment to your account
• Enable: Two-Factor Authentication for Apple ID and for all other accounts that have such an applicable option.

D. Change the Password and Passcode:

• Mac: Change or Reset the Password of a macOS User Account in macOS Mojave or Earlier - Apple Support
• iPhone: Change your Passcode or Passcode Settings - Apple Support

Your wife should complete steps 3, 4 and 5 of this article:

What to do before you sell, give away, or trade in your Mac - Apple Support

She does not need to do any of the steps that involve deleting data.

She should then create her own Apple ID.

How to create a new Apple ID - Apple Support