Hello
Tried it again this morning: same problem and maybe new information for you: I can move the white boxes with my mouse and one got me its content:
File name: /Users/bozo/Projects/Rhino5Commercial/src4/mfc/CDC.mm
Line number: 105
Code Type: X86-64
Version: 5.0.2 (5A865)
Note that Rhino doesn’t completely freeze: i can still access some menus, for example print. And it then opens a new white bigger box where i can choose my printer under conditions that i find the right place for that:
Hope this helps