1
Open system preferences and click "Keyboard"
2
Click the Keyboard Shortcuts… button
3
Click the Modifier Keys button
Tip! Make sure you see the correct keyboard selected in the top right of this screen. For example, here it says, "USB DEVICE" for the external keyboard we're using.
4
You need to switch option and command. So click the dropdown next to option and choose command.
5
Similarly, click the dropdown next to command and click "Option"
6
Click done and you're done!
7
