There is no way to adjust the sound or brightness of the M8 monitor without using the remote or some type of external 3rd party app. It seems weird since Samsung has really been targeting mac users for this monitor but it does not seamless work with it. Being able to adjust the sound and brightness with your mac keyboard is a priority. No one wants to fuss with the remote to make those adjustments. Overall really bad user experience. I just got this monitor and it really seems like they prioritized it being a smart tv over anything else.