Can Google see my MAC address?

Although they cannot see your MAC address, they are notoriously good at detecting patterns (even the most subtle) and they can easily detect your user agent and your device make/model as well as your location and the times of day you typically do everything you do... so it's not hard for them to figure it out if you ever even browse sites that use GA....and esp easy if you're using their own apps

Just my 2 cents

Google Track your MAC Address From your Browsing History .