Edit README.md

README.md

@@ -21,10 +21,9 @@ Click the appropriate link to download and install the ARM GCC compiler here for
 
 The download may take 30 seconds to a minute. Open the downloaded software and follow the instructions in the installer.
 
-On _macOS_, after the software install is complete, run these two commands to add the toolchain to the system PATH:
+On _macOS_, after the software install is complete, run this command to add the toolchain to the system PATH:
 ```
-echo 'export PATH="/Applications/ARM/bin/arm-none-eabi-gcc"' >> ~/.zshrc
-source ~/.zshrc
+echo 'export PATH="/Applications/ARM/bin:$PATH"' >> ~/.zprofile && source ~/.zprofile
 ```
 
 ## Make