Cannot run Extended (MacOS)

[Lightrix]

I run Simutrans off of Steam, and I wanted to give extended a go. However, the extended (nightly) game version crashes whenever I either fullscreen, or choose a pakset. I then tried installing the Pakset directly off the forums and adding it to the folder so it would appear in any version (image 1), but when selecting it, I'm given an error message (image 2). Could anyone help me get Simutrans extended running?

[makie]

Paks for standard Simutrans do not work in Extended, and vice versa.
Only paks designed for Extended work in Extended.

[Lightrix]

Ok, so does that just mean that Extended is incompatible with MacOS? I've tried uninstalling and reinstalling but it still crashes without fail.

[makie]

Ok, so does that just mean that Extended is incompatible with MacOS?

I don't know about MacOS

but

Your first screenshot shows the normal Simutrans with "pak128.britain-ex-nightly" this doesn't work.
The second screenshot shows Simutrans extended which is to old for the loaded pak. Maybe this is pak128.britain and not the version for extended.

Maybe you have to compile the recent Simutrans extended for MacOS yourself.