Sorry, I don't use teamwork/BIMcloud, so I won't be much help there.
But black dots instead of objects, means that the file can not find the correct libraries that contain those objects.
Check that you are loading the necessary libraries.
The paths to the libraries may be different on a Mac and Windows system, so you may have to manually load them on the machine where they are missing.
Again I am not sure if the paths are different in teamwork on different operating systems.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10