Dell C2723H Display Manager on Mac Users Guide - Page 28

the driver of such device if the latest version is available., Restart your system.

Page 28 highlights

4. Remove any docking stations or cable extenders or converters between the monitor and the graphics port. Some low-cost extenders, hubs or converters may not support DDC/CI properly and can fail Dell Display Manager. Update the driver of such device if the latest version is available. 5. Restart your system. 28 │ Troubleshooting

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28± ±
± ± Troubleshooting
4.
Remove any docking stations or cable extenders or converters between the
monitor and the graphics port. Some low-cost extenders, hubs or converters
may not support DDC/CI properly and can fail Dell Display Manager. Update
the driver of such device if the latest version is available.
5.
Restart your system.