So I know it's not the USB cable, since it worked on my friends laptop. On my MacBook pro, I can see a serial connection popping up… but when trying to connect with Repetier Host, it says “connection opened”, and 5 messages remain waiting and it never finishes making the connection. But on my iMac, nothing shows up in the list of ports (Arduino software or Repetier Host) when the printer is plugged in.
On my machines, I tried installing the Arduino software after being told that it automatically installs the necessary drivers for the printer. I was able to connect by using my friend's laptop running Windows 10, using Repetier Host to control the motors and move the extruder in all directions
However, I am not able to connect to the printer using my iMac (running to El Capitan 10.11) nor my MacBook Pro (running Mavericks 10.9). It came with a ZRIB board loaded with (I believe) the Marlin firmware. I recently purchased and assembled a Prusa i3 EG-1.
