How to extend display on MacBook Pro or MacBook Max with M3/M4 Chip?

Published On 09/25/2025 12:00 PM by QZ Support Note: The M3/M4 Pro or M3/M4 Max chip supports connecting up to four external monitors. The standard M3/M4 chip only supports a single external monitor. Check the display mode Go to System Preferences, click Displays, and then click Arrangement. Make sure the Mirror Displays box is not checked. Also, confirm that the display mode is set to Extend these displays.  Check the connection Make sure the cable is securely connected to the correct port on your Mac. You can also try unplugging and replugging the display.  Connect directly... Read more