Drag the downloaded m5burner file from the Downloads folder to the Applications folder.

Go to the Applications folder and start the m5burner program by double-clicking it.

If you receive a message that the program cannot be run because the developer is unknown, the following steps are necessary:

Open the system settings, section Privacy & Security.

The quickest way to get to these settings is to press the cmd key and spacebar at the same time and then enter "security".

Press the "Open anyway" button to start the m5burner.

Make sure that the microcontroller/sensor is not connected to the PC/Mac when starting the app.