[Flutter] Update your Flutter path (Mac OS)

1. Open up Terminal.

2. Run the following command: sudo nano /etc/paths.

3. Enter your password, when prompted.

4. Go to the bottom of the file, and enter the path you wish to add.

5. Add /Users/frost/flutter/bin

6. Hit control-x to quit.

7. Enter “Y” to save the modified buffer.

8. That's it! To test it, in new terminal window, type: echo $PATH.