My host system runs Catalina I am running Parallels 15 I am trying to install Yosemite on a fresh VM I manage to boot the installation application. After selecting the drive, the installation progress bar appears and I get the following error message: OS X could not be installed on your computer. The operation couldn't be completed. Undefined error: 0 Anybody? Thank you in advance for your help
Was happening because my install ISO was not created properly. Here are the steps I followed to create a good Yosemite ISO: https://discussions.apple.com/thread/6619535 Hope this helps someone in the future