@ajb2k3 Hello, I don't know if its related to what is being described here but the connection between my Mac(I finally found a driver that seems to "kind of" work), however the communication is totally unreliable. Indeed I need to unplug the USB-C cable each and every time I want to download a program to the M5-Stack. Then I can do one download and subsequent connections are not possible, unless I unplug and plug again. To me it sounds like a hardware issue. The concept of the hardware in a 5 x 5cm "ready to go" series of modules is great. However it has a long way to go before it becomes a comfortable system to use. I am not sure it will ever be though, as the emphasis is to produce more hardware components to sell whilst neglecting loose ends. Cheers !