Starting with MacOS 10.13, High Sierra, you will have to approve the system software from Disc Soft Ltd before DAEMON Tools app will be fully functional.

During the installation process, you will get a System Extension Blocked pop-up message. Press the Open Security Preferences button:

Allow driver

  1. Click the lock icon.
  2. Enter your Password and select Unlock.
  3. Press Allow button to add driver from Disc Soft Ltd, so DAEMON Tools app can work properly.