So, after some help, the following should deliver optimal performance, for the Steam version of Halo : The Master Chief Collection.
Go to the Advanced Preferences of Your Steam Bottle, then turn on DXVK, MSync, and High Resolution Mode. This optimizes performance for both Apple Silicon and older Intel Based Macs.
I have the full guide over at the Radio Kaos Blog
Guide to the Master Chief Collection
https://radiokaos2.blogspot.com/2024/07/guide-for-running-halo-master-chief.html