Block web browsing via MAC address

Hi,

This is my first post and I’m very new to Mikrotik. I would like to learn how to create a fire wall rule that blocks a device from browsing the Internet by its MAC address.

What I would like to achieve is to block iPhones based on time:

Example: block Internet from 11pm - 7am weekdays.

If someone can explain how do do this it would be much appreciated.

Thanks in advance.