HDR on High Sierra + Nvidia?

So I built a Hackintosh for a friend and he just recently got a HDR compatible monitor and I'm wondering if it's possible to enable in High Sierra with an Nvidia card?

I have found some old posts suggesting you need an external box (expensive!) but wondering if anything has changed with latest OS patches/drivers?

If not possible in High Sierra does it look like things are different in Mojave for when (if?) Nvidia drivers are released?

submitted by /u/Frakk4d
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