I have been exploring ways of creating Sierra 10.12 in Parallels Desktop 16 for Mac. I tried downloading the .dmg and .iso files but Parallels did not recognize the files. I was able to install Ubuntu 20.04 and Windows 10. Unfortunately, neither the Sierra nor El Capitan OS was not recognized by Parallels 16. I need these OS because my software can work run there.
Help on doing this will be appreciated.
Help on doing this will be appreciated.