OK, after about an hour of playing (and 1 bug splat) around here's what I found on my mac:
What works:
- installation
- toolbar
- web dialogue (layers panel window)
- add layer
- add group
- name/rename group/layer
- nest / move
- import layers through TIGs plugin - fills layer panel
- layer visibility toggle
Doesn't work:
- group visibility (no effect at all)
- delete layer (no effect at all)
- delete group (deletes group and nested layers from panel, but not Layers window)
- purge unused layers
Big Problems:
- existing layers don't automatically fill layer panel
- on save and close / reopen, layer panel loses all layers
- on switching focus to a second model window, the layer panel loses all layers
( probably related to the fact that Mac OS allows multiple windows in a single application instance whereas Windows allows only one window per application instance (therefore multiple model windows = multiple SU instances) IIANM.
Hope this helps. This is going to be an awesome plugin once it's debugged!