I'm running monterey 12.3.1. The copy of Extended-7.5.3-f94c8c56f-2022-02-07-macos.dmg at cant-post-external-links https openxcom.org oxce release doesn't work for me. On starting it, I get an openxcom window and I can hear the audio from the startup video. But part of the window where the game would appear is a blank gray. My mouse disappears when I move it into the window. Also, the window's title bar and the menus (at the top of the screen) are slightly blurry on the main iMac screen.
The copy of openxcom.dmg linked a few messages back ( which identifies itself as 7.5.8 ) works fine. The game video and audio are fine, and the title bar & menu are sharp.
I do have some development stuff installed, as I was previously building OpenXcom from source code.