Good to hear that XMPlay is working decently with WINE on macOS. I don't think I ever tried it on macOS myself, but when I tried it on Linux a while ago (several years ago now), it worked fine there too except for the Z-order of the panels. I guess that's the same graphical issue you're having on macOS? If so, there are skins without the sliding panels that should be less affected than the default skin.