@Marble, as nothing is showing in the cloth panel I suspect that the block DAZ added in 4.7 is still on the Mac version while it's either missing or broken on the PC version.

Easy way to check is to load in an optitex outfit, set it to collide with nothing and set the Opacity of the surfaces to zero, next load in something you want to convert to dynamic, once you have converted it delete the original non dynamic version and then set the drape to all cloth in scene and to single frame and then try to drape what's in the scene.

If it's the block as I suspect then the item you converted should drape, this was the first quick and dirty method I found to get around the block when they originally added it roughly 2 years ago.