The UNO board works fine on my macbook air mojave 10.14.6 operating system.
The MKR1010 is not recognized and I'm sure it has to do with the port not being recognized. It should be "usbmodem" instead of "bluetooth".
This is on both the desktop client and the chrome client.
I've tried installing the FTDI drivers and re-starting the laptop to no avail (How to Install FTDI Drivers - learn.sparkfun.com)