I have sold my macbook and I need to sign out from icloud and prevent the new owner to get into my data

Yas83b wrote:

I have sold my macbook and I need to sign out from icloud and prevent the new owner to get into my data

Not all the data on your Mac is protected by your Apple ID.

Did you give them the local admin name and password?

These are the steps you should have followed >> https://support.apple.com/en-ca/HT201065

If you had Find My Mac enabled, follow here >>> https://support.apple.com/en-ca/HT204756

You would logon to your icloud from a browser. I believe you can detach/drop your laptop from the list of your devices.

You could change the password so there logon files. I suggest you change the password anyway since they may be able to find it on your old machine. I'd be sure you know all your recovery data in case the account gets locked.

I have not experienced this issue, so all info is conjecture.

R