Harmony 20 won't open.

I installed harmony 20 in my Imac but when I try to open it, the pop-up window opens but it never advances to anything else. My mouse has the spinning wheel like its thinking. I can’t open it. Any suggestions?


Hi, Brittiny.
What is your macOS version number?

  • On macOS Mojave, GateKeeper prevents launching Harmony unless the quarantine extended attribute is removed from the application bundle. The quarantine extended attribute can be removed using the following command in the Terminal:
  • sudo xattr -dr com.apple.quarantine “/Applications/Toon Boom Harmony 21.1 Premium”