Finally, run this to enable the security and allows to run the Parallels Desktop.app :.Sudo xattr -d /Applications/Parallels \Desktop.app app is copied as a hidden file, so this will fix it ): Now copy and run this command ( I don’t know why but the.Sudo cp -R /Volumes/Parallels\ Desktop\ 16.0.0-48916\ -\ Toolbox\ 4.0.0-3231\ by\ TNT/Parallels\ Desktop.app /Applications