Photoflow:
DSC08448.jpg.pfi (41.2 KB)
I have a mac with a retina P3 display: macOS supports 10bit HDR on these displays (I think you may need Big Sur, but it might work in Catalina). It works seamlessly: HDR windows display highlights brighter than white in the rest of the UI. If I turn off the highlight rolloff and save the file as an EXR image, then the sunset looks amazing if you open the EXR in Preview.app (also the train has bright red lights on it!).
The .exr is 33MB but if anyone is interested I could upload it. Hey @Carmelo_DrRaw, Photoflow does real HDR images! Unfortunately, it can’t display HDR (and last time I looked (which was a few years ago), GTK’s interface to Quartz was pretty broken - it just tags everything as sRGB).