Using USB 3.0 devices (for example webcam, Ethernet adapter) on monitors that only support USB 2.0 speeds over USB Type-C may lead to intermittent performance of the connected devices. Depending on the UltraSharp monitor model, the supported USB bandwidth over USB Type-C connection is either USB 2.0 or USB 3.0.Intermittent performance of USB devices connected to monitor:.Dell does not recommend using a third-party dock or adapter to connect your Ultrasharp monitor with a Mac computer.Use the Monitor's OSD control buttons to adjust the speaker volume or screen brightness. macOS does not allow users to control sound volume or screen brightness of externally connected devices using the computer's keyboard controls.Cannot control monitor’s speaker volume with Mac computer’s keyboard controls:.Try setting larger fonts in System Preferences.Ensure that the Display Resolution in System Preferences is set to Default and not Scaled.To do this, go to your Mac’s System Preferences > Displays > Arrangement Tab > Extended Desktop (make sure Mirror Displays is cleared). Check your graphics card specification and ensure that the video card can support the monitor’s maximum resolution.I cannot get maximum resolution on the monitor:.If needed, use the power adapter that is provided with your Mac computer. Note: Your Mac computer has higher power requirement, charging time may be longer. The monitor USB Type-C only provides 65 W or 90 W Power Delivery.Reference Table 1 for more information.Įxample for the Dell UltraSharp U3219Q monitor ( Figure 2): Always connect to the USB Type-C port with Power Delivery logo (65 W or 90 W). Depending on the model, not all USB Type-C ports on the monitor support Power Delivery to charge your Mac system.Use the USB Type-C or Thunderbolt 3 cable that is shipped with your Dell monitor.There is video, but the Mac computer is not charging:.Go to System Preferences > Displays > Alt/Option key > Detect Displays.
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