Updated the command line instructions for the Mac

Author: Lenardgeorge

Diff for: content/hardware/02.hero/boards/uno-wifi-rev2/tutorials/uno-wifi-rev-2/uno-wifi-r2-chromebook-installation/uno-wifi-r2-chromebook-installation.md

@@ -44,18 +44,18 @@ The goals of this project are:
 
 Since Chromebooks cannot run executables, the firmware upgrade for the UNO WiFi Rev 2 needs to be done through a Windows/Mac/Linux computer. 
 
-**1.** Make sure you have installed [Arduino IDE 1.8.X](https://www.arduino.cc/en/software).
+**1.** Make sure you have installed [Arduino IDE 2](https://www.arduino.cc/en/software).
 
 **2.** Download the [optiboot_atmega4.hex](/resources/firmware/optiboot_atmega4809.hex) file, and move it to your **Desktop folder**. 
 
 ![.hex file in your Desktop folder.](assets/hex-file-desktop.png)
 
-**3.** Open your Command Prompt (Windows) or Terminal (Mac/Linux), copy paste the command for your OS from the snippets below.
+**3.** Connect the Uno Wifi  board to your computer and open your Command Prompt (Windows) or Terminal (Mac/Linux), copy paste the command for your OS from the snippets below.
 
 ### Mac
 
 ```
-/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avrdude -C /Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf -v -patmega4809 -cxplainedmini_updi -Pusb -b115200 -e -D -Ufuse2:w:0x01:m -Ufuse5:w:0xC9:m -Ufuse8:w:0x02:m -Uflash:w:/Users/$(whoami)/Desktop/optiboot_atmega4809.hex:i
+/Users/$(whoami)/Library/Arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/bin/avrdude -C/Users/$(whoami)/Library/Arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/etc/avrdude.conf -v -patmega4809 -cxplainedmini_updi -Pusb -b115200 -e -D -Ufuse2:w:0x01:m -Ufuse5:w:0xC9:m -Ufuse8:w:0x02:m -Uflash:w:/Users/$(whoami)/Desktop/optiboot_atmega4809.hex:i
 ```
 
 ### Windows
@@ -153,4 +153,4 @@ If things are not working as expected:
 
 ## Conclusion
 
-In this tutorial, we learned how to upload sketches to the UNO WiFi Rev 2 board, using the Web Editor on a Chromebook. For more tutorials on the UNO WiFi Rev 2 board, visit the [official documentation](/hardware/uno-wifi-rev2).
+In this tutorial, we learned how to upload sketches to the UNO WiFi Rev 2 board, using the Web Editor on a Chromebook. For more tutorials on the UNO WiFi Rev 2 board, visit the [official documentation](/hardware/uno-wifi-rev2).