Hi i had the same Problem seeing just black ships with lights when using Parallels Desktop on Mac OS X.
I have a Mac Pro 3,1 and a Geforce 680
This is how i solved it 
Turn Gamma and Brightness in GalCiv3 Options to max and Graphics Settings to ___LOW___
maybe you have update your Graphics Drivers.
Today i tried also with VMWare, it says it supports DirectX 10 now, but not on Mac OS X.
The evidence:
http://www2.pic-upload.de/img/28801537/Bildschirmfoto2015-11-08um17.37.10.png