YAWL can be installed under Windows, Mac, and Linux. For YAWL 4.3 you need JAVA 8 or newer. If you don't have a JAVA installation yet look at this tutorial. 

  1. Go to the YAWL foundation web site.
  2. Run the YAWL installer and follow the instructions.
  3. Open the YAWL control panel.
  4. Click the update functionality.

Then the engine will start. You can check whether your installation was successful by clicking on the third button from the left ("Open the YAWL Logon Page"). A window should appear that shows you a login. There you can log in with user name admin and password YAWL.