I've moved this to its own topic. Please do not tack on a question/issue to a completely unrelated topic (this came from the thread on the latest hotfix).
Editing slab and roof angles on Mac works fine for me with the latest hotfix for AC 20 and OS 10.11.6
What is not working for you? Are you not able to select the edge-editing option from the pet palette (top right icon) when you mouse-down (mercedes cursor) on an edge?
