Try the Engineer's solution:
Before panic: Check obious things: renovation filters, layer combs, cutplanes, 3D filter, and even Teamwork view filters.
then--->
1- Restart............. if that doesn't work
2-Update Graphics Drivers ( but you're on Mac so that should not be an issue)
3-Re-install ArchiCAD.
Do the other guys on your teamwork file have the same problem?
Nando Mogollon
Director @ BuilDigital
nando@buildigital.com.au
Using, Archicad Latest AU and INT. Revit Latest (have to keep comparing notes)
More and more... IFC.js, IFCOpenShell
All things Solibri and BIMCollab