Can I still play the Steam version of Medieval II: Total War™ once the system requirements change for v1.1.2?

Higher system requirements for the v1.1.2 update are needed to resolve an ongoing issue in macOS 14. This means that macOS versions prior to macOS 14, as well as some older graphics cards, are no longer supported.

If you are no longer able to play the game after updating to v1.1.2, roll back to the prior version as follows:

Launch Steam.
Right click the game in your Steam Library.
In the dropdown that appears, select Properties.
In the new window that appears, select the Betas tab.
In the Betas tab, click the dropdown and select mac_1.1.1 - macOS 13 or Intel GPUs only.
The game will update.

Once the update is completed you will be playing v1.1.1, which is the version that you were playing before update v1.1.2.

Note: If you are using macOS 14, you will still experience stability issues in v1.1.1 when a video plays in the game. To work around this, you must delete non-gameplay critical videos from the game's data by following the steps below:

Launch Steam.
Right click the game in your Steam Library.
In the dropdown that appears, select Properties.
In the new window that appears, select Installed Files → Browse.
In the Finder window that appears, navigate to Medieval2Data → localised → en → data → fmv → event.
Delete all of the video files from this folder by dragging them to the Trash.
Now, in the same Finder window, navigate to Medieval2Data → localised → en → data → fmv → faction.
Delete all of the video files from this folder by dragging them to the Trash.
Launch the game. The pre-game Options window will appear.
Select the Support tab, then select Open Preferences Folder. A new Finder window will appear. Before continuing, close the pre-game Options window.
In the newly opened Finder window, look for a folder named cache. Delete this folder by dragging it to the Trash.
Relaunch the game.

The game should now run without issue, though without non-gameplay critical videos.