You can click on this link and download Parallels Desktop 13 but if you are going to use it in macOS X Catalina, it might not work.I had Parallels 13.0, but my Mac died, so I am trying to install on my new Mac Pro Tower. I need the 13 download. I have the activation code for the 13, but when I go to my account online at Parallels.com and log in, it only shows version 15 for download, which the old activation code won't work for it. How can I get this loaded onto my new computer? I will gladly upgrade to 15, but don't want to pay for a new version, since I had the 13 originally. Any ideas, tips, helps greatly appreciated.