Something very weird happening here. I have been using my MPCNC for over a year with a PC/Windows 10/GRBL/UGS.
I tried to connect my MPCNC to a macbook. Since then the motors are working very weakly and almost not moving at all. I reconnected the MPCNC to my PC but it has the same behaviour. Any ideas how to debug? I checked a lot of things already.