Update README.md

Add MacOSX Install guide

README.md

@@ -7,13 +7,22 @@ USB Driver must be installed to be able to connect gStabi System to PC.
 [Download USB Driver](https://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx)
 # How to install:
 ## Windows:
-1/ Download Installer for Windows in [Release](https://github.com/Gremsy/gStabi-Software/releases)
+1/ Download zip file for Windows in [Release](https://github.com/Gremsy/gStabi-Software/releases)
 
 2/ Unzip the file.
 
 3/ Run setup file to install software in Program files.
 
 4/ Download USB Driver and install on you PC to be able to connect to gStabi system.
 
+## Mac OSX:
+1/ Download zip file for OSX in [Release] (https://github.com/Gremsy/gStabi-Software/releases)
+
+2/ Unzip the downloaded file.
+
+3/ Run dmg file and install the App to Application Folder.
+
+4/ Download USB Driver and install on you Mac to be able to connect to gStabi system.
+
 # Support:
 Feedback or support needed, please email to us at [email protected]