[Mac Demo refuses to start after unzipping]

Navigate to downloads in "Finder", right-click (or two finger tap), select open. This way you're explicitly allowing unsigned app to run.

[rotation broken on macOS]

Rotating parts doesn't work for me. Tried with two accessories:

 

• Logitech G500
  
• Apple Magic Trackpad 2 (two-finger gesture).
  

 

Software and Hardware:

Nimbatus 0.2.0 pre-alpha

High Sierra, 10.13.1 (17B48)

27-inch (5120 x 2880) Radeon Pro 580 8 GB

Hardware Overview:

  Model Name: iMac

  Model Identifier: iMac18,3

  Processor Name: Intel Core i7

  Processor Speed: 4,2 GHz

  Number of Processors: 1

  Total Number of Cores: 4

  L2 Cache (per Core): 256 KB

  L3 Cache: 8 MB

  Memory: 40 GB

  Boot ROM Version: IM183.0151.B00

  SMC Version (system): 2.41f1