I got C&C Untitled running natively (no virtual machine like Parallels, VMWare or CrossOver) on Mac OS 10.13.3 using the Command & Conquer Mac App Store (Aspyr) Deluxe Edition.
Here's screenshot of where the files are placed currently:
https://s10.postimg.org/jj3mxx8ax/c_c_untitled_on_mac_aspyr.jpg
In the screenshot the files on the left are the functioning ShockWave installation and the files on the right show the functioning (but slow) C&C Untitled installation.
Maybe someone can provide some clues about why the game is running slowly?
This screencap should be more legible:
https://s9.postimg.org/xj9nkndov/command_and_conquer_untitled_big_file_locations.jpg
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