Login to another Mac computer
I have realised that I am still a user on my ex's Airbook and he is a user on my Mac. I want to remove him as a user on my Mac, I've been unable to find out how to do this and more importantly I wonder if there any ways to remove my user account off his Laptop (apart from asking him to do it!)? I'd prefer not to ask as he is then aware that I'm still on his system.
I appreciate any help you can give as I've done lots of searches and can't find any answers to this question.
Sue
iMac (21.5-inch Mid 2011), iOS 8.3