https://wccftech.com/halo-the-master-chief-collection-update-out/

Halo: The Master Chief Collection today got its enhancement update, after a few months of testing via the Insider Program. The update weighs a hefty 73GB, according to 343 Industries, and packs all sorts of improvements in areas such as matchmaking, offline LAN support, faster loading times, the ability to install each game or separately, and of course theXbox One X enhancements.

Halo: The Master Chief Collection will be available as part of the Xbox Game Pass subscription from September 1st.