Proxy breaks cross platform

I setup my model on PC for Thea Render and then when I render on Mac I get a warning that external model not found. It has a PC path (C:/ProgramData/etc…). Any solution that doesn’t bloat my model file size (embedding full geometry)?

Windows 10
SU 2017 PRO (latest)
Thea for Sketchup 1.5.08.488.1455 x64
Skatter 1.3.0

OSX 10.12.2
SU 2017 PRO (latest)
Thea for Sketchup 1.5.08.488.1455 x64
Skatter 1.3.0

Are you using the objects shipped with Skatter?

Yes

Then this is to be expected. Any proxy containing a link would have to be relinked if moved to another machine, unless the path is preserved, which can’t be the case here (Windows and OSX have very different file structure)