No more not responding

Hi Everyone, I have a 2020 Mac Mini. I have been using it without a monitor and have the 'not responding' message continuously. Last week, on a podcast episode of Double Tap, one of the guests mentioned he did not get the dreaded 'Not Responding' message and that he was using a HDMI dummy. So, I purchased a HDMI dummy. I placed it into the Mac Mini and proceeded to navigate around my Mac. I opened one app after the other, and to my amazement, everything is more snappy, and no more 'Not Responding'!!!! tHANK YOU dOUBLE Tap!