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Mac · display limits

How many external displays your MacBook can run, by chip

The short answer

The chip in your MacBook sets how many external displays it can run, and a standard dock or hub can't raise that number. Apple lists:

  • 1 external displayM1, M2, M3M3: a second external display with the lid closed
  • 2 external displaysM1 Pro, M2 Pro, M3 Pro, M4, M4 Pro, M5M5: both over one Thunderbolt port
  • 3 external displaysM5 ProM5 Pro: all three over one Thunderbolt port
  • 4 external displaysM1 Max, M2 Max, M3 Max, M4 Max, M5 MaxM5 Max: all four over one Thunderbolt port

External displays as Apple lists them on each MacBook's Tech Specs page, checked Oct 12, 2026. The counts are in addition to the built-in screen, except the M3's second display, which needs the lid closed.

To see your chip: Apple menu → About This Mac. Then check the dock: it also needs enough video outputs, and some state their own Mac limits (below).

Your Mac's own limit, by chip

From Apple

These are the Mac's limits across all its ports together. Through one dock on one cable, the dock maker's own limit (further down) can be lower.

External displays by chip, with the MacBooks that use each chip
ChipExternal displays
M11
M1 Pro2
M1 Max4
M21
M2 Pro2
M2 Max4
M31+1 with the lid closed
M3 Pro2
M3 Max4
M42
M4 Pro2
M4 Max4
M52all over one Thunderbolt port
M5 Pro3all over one Thunderbolt port
M5 Max4all over one Thunderbolt port

What a dock can and can't change

Our take

It can't add displays beyond the chip's limit.A Thunderbolt or USB-C dock passes the Mac's own display outputs to its ports, so a base M1 or M2 MacBook stops at one external screen. (DisplayLink docks, which drive extra screens through a software driver, are a different kind of product; none is covered here.)

Two HDMI ports don't always mean two screens on a Mac.Some hubs split one connection into two HDMI outputs with a technique Macs don't support, so both screens show the same picture. Anker states this for the 553 hub; its review and the list below show it.

One cable or several.Apple's pages for M5-family MacBooks add that all their external displays can run over a single Thunderbolt port. Earlier pages don't say, and dock makers list their own limits for those Macs: Anker, for example, says M4 MacBooks can't run three displays over one Thunderbolt 5 connection to its Prime dock.

Through each dock: what its maker says about Macs

Maker data

These makers state Mac-specific display limits for their product, in their own words:

For these we have no Mac-specific display statement on record. That doesn't mean the maker publishes none; check the maker's page before counting on more than one screen from a Mac:

Compare products for two or more monitors

Sources

Display limits: each MacBook's Tech Specs page on support.apple.com (linked in the table), quotes stored and re-checked on Oct 12, 2026. Dock statements: each maker's product page, as quoted in the product's review. How we review.