Deleting a Mac from my account

Tinachristian436 Said:

"Deleting a Mac from my account: How do I keep someone from signing back in on my account from their Mac and their Apple Watch and their iPad?[...]"

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Securing an Account:

If this is your computer (not her computer), then perform the following...

A. Deauthorize All Option:

Try Deauthorize All. You can only Deauthorize All items once every 365 days. So, you may have to wait up to a year before you can perform this.  Go Here: Authorize or Deauthorize your Computer for iTunes Store purchases - Apple Support

B. Verify the Devices:

Verify that the devices assigned to your iCloud are your devices: Check your Apple ID Device List to See where you're Signed in - Apple Support

C. Consider Modifying your Crdentials:

Having been confiscated, consider modifying your credentials.

• 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