Can some please explain in detail how Mcdonald bak egg muffin and from where I can find the cookware they are using.

Google and websearch.

It's like a round cookie cutter with a handle, go to any cooking store and you will probably see one, I see them all the time.

You can also use an empty tuna can (I think they're 6.5oz - I could be wrong on the measurement, but the small can-), and remove both the top and bottom of the can - it gives you the right mold for the egg.

Kchowdery... Read the rules before you disagree.
And do not use capital letters except where they are supposed to be. It's as though you're shouting. We do give our time to try and help and you should say thank you instead of being ungrateful.

To the OP, go to McDonalds and ask. Obviously we can't help you here.