How can I control a Samsung TV's volume and brightness from BetterDisplay?

For a compatible Samsung Smart TV, add BetterDisplay's Samsung network controller to use remote-style volume-up, volume-down and mute commands. This controller does not provide an absolute volume slider or a TV backlight-brightness command.

Open Settings > Displays > [TV] > Device Control. Use Add or Remove Controllers… to add the Samsung controller if needed, then open Configure Samsung Smart Device…. Enter the TV's Device IP address and authorize the connection on the TV if prompted. The TV must be reachable on the network, and its associated display must be connected.

Compatible Samsung Smart Monitors can use the same network path. A failed DDC connection does not rule out network remote commands: these use the device’s network address and authorization rather than the video cable’s DDC channel. The virtual remote includes source and HDMI buttons, but the commands a particular model accepts still determine what you can switch.

Leave Enable volume control on. If another controller takes precedence for volume, review that assignment before expecting the Samsung controller to handle your adjustments. In the display's Device Control menu, enable Show Samsung Remote to see the remote. Commands act like remote buttons, so requesting a specific percentage is different from sending a volume-up or volume-down step. A receiver handling sound through HDMI-CEC can also affect the result.

If the on-screen Samsung remote changes volume but the keyboard does not, open Device Control > Volume Control… for the display. Under Feature Availability, inspect Volume control and Controller. Samsung can provide up/down-only control. Then check native volume-key handling and the target display under Settings > Keyboard. A working remote confirms that its command reaches the TV, but does not establish that keyboard events use that controller or target.

The Samsung network controller has no brightness command. If the TV does not accept DDC brightness commands either, enabling DDC cannot create that capability. Use the TV's own picture settings for hardware brightness. BetterDisplay's software dimming, where available, changes the image rather than the TV's backlight setting.

A working network remote does not change the resolutions the video connection supports. Missing 8K modes need a separate check of the Mac, adapter, connection and TV input settings. A cable advertised for 8K is not proof that the complete path supports the desired mode.

See Samsung network-controller setup and DDC through adapters and docks for the separate control paths.