Why do you spend so much time on a very old macOS which is not supported by Apple for 2 years? Yes by Apple standards it's too old, out of business. I have an iMac mid 2011 with last supported macOS High Sierra and it stay as a decorative object =)) I can't use it for may work because I can't install latest Apple developer tools, also any app which required Metal or any new Apple framework will not work on High Sierra. For Apple it doesn't matter, they sell hardware and make money not charitable acts. Why I should care about? Hackintoshes or Ryzentoshes are not for simple users which can stay on a PC / Mac with an old browser, Word, Excel 2007 and they are happy 😉 Have a nice day!