I want to bring my Mac desktop to an apple store at Pleasanton Mall

If you want to make an appointment with Apple, you need to make it with Apple. Not with us. Since you have a particular retail Apple Store in mind, I would suggest calling them.

Franco,

We are end users just like you are. If you want an appointment at the Pleasanton Apple Store, please call them and make the appointment. If you have difficulty doing that then please call AppleCare and they will assist you.

AppleCare Contact Info