I’m encountering a strange problem on Mac OS Sierra.
First I bought Arduino Mega 2560 and installed FTDI driver. All worked fine each time I connect it to Mac via USB Hub.
Then I also bought Arduino Uno and installed CH340 drivers.
Now Mega 2560 sometimes works, sometimes not. This morning I plugged it in, it worked for around 2 hours and then Arduino suddenly stopped. If I unplugged and plug in again, it does now show desired port in list of ports in Arduino IDE. Restarting Mac sometimes helps, sometimes not. I also get the same behavior with Arduino Uno. Sometimes port cant be seen in Arduino IDE, so I cant connect and sometimes it works without any problem.
It is important to note that I’m using Mac 2017, without a USB port, so I’m using USB HUB to connect Arduino via USB cable. Can it maybe cause issues? Of maybe some other program is using same PORT? Or maybe these 2 drivers (FTDI and CH340) are somehow interfering in some moments?
I mean, it is totally inconsistent, sometimes it works, sometimes it simply disappears. Sometimes first restart of Mac helps, sometimes I need to restart 2-3 times to make it work.
Thanks you very much in advance,