I am running Napoleon Total War on my Macbook Pro 16 inch intel chipset. OS 14.0. I am able to install NTW via steam and it loads up to the main menu. When I select a campaign to launch to campaign loading screen runs up to 90-95% but then freezes. I can hear the in-campaign audio but it does not progress any further, regardless of what I do. Any help anyone could offer would be greatly appreciated?

You might try contacting the game's Mac developer https://support.feralinteractive.com/en/mac-linux-games/napoleontw/.