@everyone who experience the "black box" issue with Hotel Mac version.
we have spend hours trying to locate this issue are release the fix for it. unfortunately, we were unable to do so.
as always, we test our games before the release on many different systems and hardware configurations, including old Macs (PPC), both 32 and 64bit OS.
We ran tests on newest Mac OS last week and we were unable to detect the "black box" issue. Obviously, the problem exists only on the specific "hotel lobby - fireplace" scene, but, honestly, we simply have no answer why is this happening

we have another suggestion for users who experience this issue: in settings menu, try to turn OFF effect or particles. Please, let us know if this helps.
If the problem remains unresolved and you are unable to click anything on that scene (pick up items, talk to other character, etc.) and resume the game, unfortunately, the only thing we can advise is that you ask for the refund from Apple's Mac App Store. We think that this is supported without problems.
We are sorry for the inconvenience and we want to thank you for you patience and understanding.