I have one of these cheep 2560 clones with the CH340 chip set. I installed the driver CH341SER_MAC, but sometimes i plug the board in i get the following message and have to manually shutdown my Imac;
"You need to restart your computer. Hold down the power button until it turns off, then press the power button again".
I've googled this, and apparently it's called a "kernal panic", and related to quote below;
Actually, I was too quick assigning blame. It was nothing to do with the USB-serial at all, and everything to do with the capacitor on the Arduino power supply. (presumably a large current surge when plugging-in caused a rather serious problem. But it shouldn't crash the Mac surely?)
How can i get around this / what is the solution to the above?
Use an external power supply, so not using the USB power, or could i hack a USB cable with resistors on the power lines?
Any input welcome.