No way to force custom resolution on macOS?

[Tante2k]

It's been a few years since I last tried OpenTTD, and that was on Windows.

Just installed it on macOS, and I'm having issues getting the resolution in the CFG to stick. It seems to always default back to the screen res (2020, M1 MBA.)

Am I missing something here? I'm not interested in rescaling the GUI or anything of the sort, I want to render the game in a lower resolution.

[skc]

I'm running OTTD on Debian, and in full-screen mode the resolution setting is ignored.

Or are you referring to the resolution setting (in windowed mode) not being kept when you close and re-open OTTD?

[Tante2k]

I'm referring to the full screen resolution.

Why is it ignored? Is it different on Mac contra Windows? I seem to remember the resolution setting working the last time I tried OpenTTD (on Windows.)