How to remove Mac from iCloud?

[Matouš]

I wanted to sell my iMac so I erased the hard disk and reinstalled the OS X bout then I realized that I haven't disassociated my Apple ID. I can log in on the mac with any Apple ID so there is no proble, but I can't remove this iMac from my Apple account.

Do you know how to remove the Mac from my account?

 

[Floris]

Have you tried going to the apple.com's appleid web site and under devices, remove it?

 

[Weaselboy]

https://support.apple.com/kb/PH2702

Just follow this. Go to icloud.com and follow the instruction at the link to remove it.