There is a new release of BlendLuxCore 2.9 which now contains Mac versions for Intel and ARM!
On my MacBook M3 on Blender 4.3 it works stable and while BiDir Render speed has improved, PathOCL on GPU is slower than my main installation of LuxCore 2.61 on Blender 3.1.
I recommend to test this new experimental version as the developers have asked for feedback.
The installation is now different, a tiny file to download that then initiates a runtime installation from within Blender matching the Operating System.