The good news: E-M1 RAW support in Apple Aperture is here.

The bad news: Some files after import have a pink/purple colour (very obvious, not a white balance thing). But there seems to be no rhyme nor reason to which files suffer this problem.

I have read a couple of posts on the Apple forums also highlighting this so I am not alone.

If anyone stumbles upon an explanation/resolution of this the PLEASE post it here!

Many thanks