Almico wrote:I know nothing about the Mastech, but on my MacBook Air, if I plug anything into any other USB port, my Phidget readings go away. I'm sure there is a way to reconfigure, but I do not know how.
That might actually be a power problem. USB ports are limited in the power they provide and most connected devices consume some. At one point the USB hardware decides to switch of a port. This is true for some machines. Had issues with an MacBook Air too. Not with another very old MBA nor a MacBook 12" 2015 nor a current MBP. On that MBA I could re-activate those USB ports only via a reboot. There was no software trick I could find to resolve this.