A bit complicated on a mac

The device works very well and is very convenient. No commissioning worry, you plug and it is recognized by the mac. The "advance" buttons "back" and "start slide show" operates seamlessly with PowerPoint.
However, the button that darkens the screen is not recognized and "start the slideshow" button to exit the slideshow and if you press it again, you always come back at the beginning of the presentation , very unpleasant.
After investigation, this device simulates a keypad and therefore sends simulated values ​​of key on a keyboard, so you have to install a small free software that allows to intercept and modify these values ​​so that they are understood by the relevant software . The advantage, then, of this technique is that you can use this unit to control other software other than PowerPoint.