I am still having trouble logging into my Microsoft account on my Mac and as well as my PlayStation 4 now. My PlayStation is now telling me that it looks like my account is already connected, but I am not even able to access my Minecraft on my Mac. I am using the same email for both and I assume that the system is getting confused about the sort. The issue has Not been resolved if anything it has gotten worse because it has now been carried out to my PlayStation Minecraft that I can no longer sign into. I hope there is an update that can fix this issue because talking to customer support 2 times has been 0 help
Today at 2:50 pm for my MacOS Eastern Standard Time the launcher for Microsoft login worked! before it worked it was presented in my app store updates 3 different updates for my computer; MacBook Pro (Retina, 13-inch, Early 2015)
Safari Versions 12.1.2
Remote desktop client updates Versions 3.9.3
macOS Sierra Update Versions 10.12.6
I updated all of them to my mac and I redownloaded Minecraft and was shown both options to login Mojang or Mojang Microsoft. Of course, I clicked login Microsoft and it brought me to the regular Microsoft login screen as it shows on the web and it logged in and I was successfully brought to the launcher "Minecraft Java Edition".
Everyone should check for updates on their mac and check in their Finder for anything that says: Sierra Update Versions 10.12.6.