What exactly are you trying to do? Install or uninstall the driver? You tried to run the uninstaller, so I presume that's what you want to do. Here are some things you want to check. 1) Make sure the USB cable is completely disconnected between the rig and the Mac. If the rig is connected to the Mac, even if the rig is turned off, the install/uninstall will fail. 2) Is the file "uninstaller.sh" located on your desktop? Did you extract it from the DMG file and place it on the desktop? 3) The easiest way to run a shell script like this is to make it executable. So, once you've copied it to the desktop, open the terminal program and make it executable through the following commands: cd ~/Desktop sudo chmod +x uninstaller.sh After you enter you password and hit enter, you should be ready to execute that script by doing the following: sudo ./uninstaller.sh 4) Reboot. When you log back in, the driver should be uninstalled. If you then want to install the latest driver, keep the USB cable to the rig completely disconnected and run the driver install. When it finishes, reboot. When you log back in, check the General Tab of the Security & Privacy pane in System Preferences to see if you have a warning about allowing the extension to load. If you do, approve it. If not, then and only then connect the rig to the computer. You might want to read the post HERE which includes directions for installing the driver, step by step. Although written from the 590, the driver install is exactly the same for the Icom rigs that use this same chipset.