Yes Mccormick Cinnamon is real cinnamon.
But the cinnamon that Mccormick uses for their cinnamon is Cinnamomum zeylanicum that is grown in Sri Lanka.
Cinnamomum zeylanicum cinnamon is true cinnamon but it's a bit different cinnamon that is used in the united states due to the difference in flavor.
Still Mccormick is good cinnamon and real cinnamon but it has a different flavor to it than other cinnamon brands and types do because of the different type of cinnamon that is used to make Mccormick Cinnamon.
It's real cinnamon just like other cinnamon but it has different tastes to them.