Grbl Controller For Mac

GRBL is an useful open source software that helps in effective control of CNC machines. A GRBL CNC controller can function effectively when you connect GRBL with Arduino. Due to its use with Arduino, it is easy to set up G-code since the input and output point offers easy control.

Grbl Controller. Grbl Controller is software that is designed to send GCode to CNC machines. Versions Review Comments Questions & Answers 3.6. This app allows the Xbox One controller to be connected to the Mac. OnTheAir CG Controller. OnTheAir CG Controller - A simple and easy to use Character Generator on the Mac. Grbl Controller (Bluetooth USB)Use your smart phone to stream G-Code to your CNC machine with GRBL 1.1 firmware.Features:. Supports Bluetooth and USB Otg.

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Grbl Controller 3.6.1 for Mac, Windows and Linux - by Zapmaker

Grbl Controller is a piece of software which is used to send GCode to CNC Machines, such as a ShapeOko. As of version 3.0, the software has been optimized to send GCode to a Grbl Arduino Shield, which is the standard and default controller type for the ShapeOko.

Grbl Controller is written to work on Windows, Mac, and Linux. It has been written as a superior replacement for the popular GCodeSender, and UniversalGCodeSender.


User Bobt was able to get it running on a Raspberry PI.[1] c.f. Running Grbl Controller on Raspberry Pi

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Implements “Agressive preload” and Z-rate limiting options.[2]

Will trim too-long lines when sending.[3] Current version doesn't consider line-endings, so will overflow the buffer, change the Grbl Line Buffer Size in Tools Options from 50 to 49 (48 on linefeed and carriage return systems such as Windows).[4]

Home page

Visit the Grbl Controller home page

On-line Documentation


Installers for Mac, Windows and LinuxGrbl Controller by Zapmaker

Building from Code (may be necessary for Linux)

See information here

Using Grbl Controller 3.0


  • Power up Arduino and shield
  • With motor off, manually position milling bit over origin (0,0) on the work piece. The origin is the intersection of X and Y on your CAD drawing.
  • Start Grbl Controller
  • Select COM port and open


  • Choose appropriate step size (start with 1)
  • Press the Z down button, the milling bit should move down towards the work piece 1 mm. The Z jog speed can be adjusted in menu Tools -> Options
  • Repeat until the the bit is almost touching
  • Turn on motor
  • Press Grbl Controller's Reset button to zero the Arduino Grbl code

Sending G-code

  • Choose Send GCode radio button
  • Open desired file, usually .nc
  • Press Begin. If for some reason there is a long, slow traverse, the controller may time out. Increase timeout value in Tools -> Options

How To Use Grbl Controller


  • Turn off motor when milling is complete

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Grbl Controller Mac Os

  • Press the Reset, Stop or Close button on Grbl Controller - the steppers should stop within a second or two. If not, power off your shield

Original Kosme Version

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