- System Preferences
- Go to Security and Privacy
- Go to Privacy Tab
- Click on on the Lock at the bottom to make changes, enter your password, click Unlock
- Click on the MR Editor box and the Yamaha Firewire Control Panel box
- Click the lock , done
Also, you need to go to the security settings when installing the drivers and allow them to be accessed if I recall. So uninstall the driver, extension and MR console using the installer app. Re- install then go to the security settings and see if it asks to allow the installation.
Try a
- Reset NVRAM, Option+Command+P+R while booting up, hold until 3rd chime then let the keys go
- Reset SMC, Shift+Control + Option, NOTE: SMC reset may be diff depending on which Mac you are using