It "works" under Windows and OS X, but if by "working" you mean it runs but is generally unusable. I haven't been able to ever get it working properly under OS X. It didn't even get to the point where it showed a UI, the last time I tried it.
I've been using it on OS X for several years - it's clearly not a native OS X app, but works just fine. And for me personally, the new version is really excellent since I have a lot of old Corel Draw/WMF (yuck) files floating around.