4. Mac - Model 1A+/2A : Troubleshooting the Touchscreen
MP Controller Documentation
9. Troubleshooting - Mac OS
You need Mac OS Mojave or above for the touch function to work.
The touchscreen should still function as a large touchpad, allowing you to control the mouse cursor on the display where it is currently located. If it is not, do not install UPDD or the Touch Ut...