External Monitors
How Many Monitors Can the MacBook Pro (16-inch, M1 Max, 2021) Support?
The short answer
The MacBook Pro (16-inch, M1 Max, 2021) supports up to 4 external displays simultaneously.
Last verified 8/20/2026 · Sources: Apple
Specifications
- Max simultaneous external displays
- 4
- Video outputs
- usb-c-dp-alt-mode
- Max verified resolution
- 6K@60Hz (up to 3 displays) plus one 4K@60Hz over HDMI
Details
Via usb c dp alt mode (Thunderbolt 4): up to 4 displays at up to 6K@60Hz (up to 3 displays) plus one 4K@60Hz over HDMI.
Conditions
- HDMI is HDMI 2.0 on this generation — capped at 4K/60Hz, not 4K/120Hz+.
- M1 Max supports 3 simultaneous Thunderbolt external displays; a later regression on M2 Max/M3 Max limited that generation to 2 (restored to 3 on M4 Max).
Worth knowing before you buy
- Reaching the maximum simultaneous display count may depend on which ports are used together and the cable/adapter's own bandwidth — mixing connector types can behave differently than using a single port type.
Sources
- Apple — MacBook Pro (16-inch, 2021) - Technical Specifications — verified 8/20/2026
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