It’s not just the default photos application. Even windows explorer is not color managed. where stems the issue. Also the apps mentioned in the linked post and a few other forums are garbage and must be used as a last resort.
another thread. Seems you need to use an older viewer hacked to make it work. Why Is this even an issue in 2019?
I'm still trying to understand why color calibration for Explorer is important. Explorer is not a photo viewing applications. Its only ability to display images is through thumbnails and a, relatively speaking, small preview pane (if enabled). If one needs to view / edit images Explorer loads it with whatever default image viewing / editing application is defined, typically Photos as it's the default.
As for the applications listed in the link the link is dated September 2015, so it's over four years old. When I look at the images (of the girl on the beach) I can definitely see a difference between the two (even on this small 12" laptop screen) but I wouldn't consider the one on the right so poor as to be an issue when browsing through files.
Perhaps it's because I am not working in this field that I don't see the issue. What I do know is if color calibration is important one should use an image viewing application which utilizes color calibration. I can image there have got to be several of them for Windows.
what is beautiful about the Mac is that the entire OS is color managed. I simply don’t need to care about color management anymore. I calibrated my displays and have not looked back since. Trust me, my photos look 99% the same when delivered to clients and I am very happy about it.
I get the impression you're mixing application and OS color calibration support. While I have no reason to disbelieve macOS itself is color calibrated I am certain I could applications could ignore it and do their own thing, it's just that they don't.
the HDR is a issue in windows indeed. My teammate who works and edits on windows hasn’t found a solution with either black magic or adobe. They both claim thats its due to poor HDR management in windows. They are willing to sell us expensive hardware and much more expensive monitors when that can be simply achieved by a windows fix. He forwarded me the link and I pasted it here. I don’t work HDR so am frankly not concerned
I did a little more reading on this and it looks as if it requires a lot of different factors to get HDR working properly. From display to GPU to drivers to cables (and connector type) to applications to OS support. Again this is another area outside of my experience so I cannot say whether or not Windows is the chief culprit or if other factors are (or a number of them).
What did become apparent to me was not that Windows cannot do HDR but rather a lot of things need to come together to get it to work. With the Mac Apple controls a lot of those components and therefore can better ensure it works with their equipment.
Therefore it may be easier on the Macintosh to use HDR than on the Windows
platform as Apple has already done that work for the end user.
In the end this topic is outside of my area of expertise so I cannot state, one way or the other, the level of support for HDR.