To get official mods, you can use CrossOver for Mac (there are often significant discounts) and under CrossOver you install Steam PC version which you use to install inZOI PC version (free since you purchased the Mac version on Steam). Just the old mods in ~mods are not taken into account.
Since the late March update based on Unreal Engine 5.6, inZOI works perfectly under CrossOver. I even find that the PC version is slightly better graphically (no noise in the shadows) and practically just as fast. It’s worth knowing that CrossOver uses a driver that redirects Direct3D access to Metal, so no slowdown because there’s no D3D emulation.