Anyone having issues with the low level of antialising?

Test.set_AA_method(4) doesn't seem to have any effect in 2017.

This is to do with 'subdivs'. There are many settings in VRay which could be tweaked to improve your render. To start click on your light source and under the rollout look for 'Sampling' increase the subdivs from the default is 8. Increase this to 16 and take a test render. The higher you go the longer the render will take.

There are lots of tutorials out there on Google and YouTube that will help you with this.

I'd love to use SketchUp on a Mac being a macuser since the 80's I love em to bits. Thing is they are simply too expensive and underpowered.

Octane for SketchUp has recently been released and its going to be a game changer. It relies of the CUDA cores found in Nvidia cards and its fast...very fast.

An new intel i7 4GHz with 2 x GeForce GTX 780ti running Octane will give near real-time rendering and nothing in the Mac line up comes close. Unless you just gotta have a Mac I'd seriously consider the PC option.