Connect multiple displays to your iMac Pro

With four Thunderbolt 3 ports built-in, iMac Pro supports up to four 4K displays or up to two 5K displays.

You can connect as many as four displays in these configurations:

  • Two 5K displays with resolutions of 5120 x 2880 at 60Hz
  • Four single-stream transport (SST) 4K displays with resolutions of 4096 x 2304 at 60Hz
  • Two multi-stream transport (MST) 4K displays with maximum resolution of 4096 x 2304 at 60Hz
  • One 5K display at 5120 x 2880 at 60Hz and up to three SST 4K displays at 4096 x 2304 at 60Hz*

You can connect LG UltraFine 4K displays and LG UltraFine 5K displays in these configurations:

  • Two LG UltraFine 5K displays configured as dual-link SST 5120 x 2880 10bpc at 60Hz
  • Four LG UltraFine 4K displays configured as SST 4096 x 2304 8bpc at 60Hz
  • One LG UltraFine 5K display connected to port 1 or 2 and two LG UltraFine 4K displays connected to ports 3 and 4 (see the figure in the next section)

*Connect the 5K display last.

Connect to Thunderbolt ports on different buses

Connect your displays to the Thunderbolt ports on your iMac Pro. Use different Thunderbolt buses when possible (see the figure). Don't connect more than two displays to any bus. If you connect a 5K or MST 4K display, you need to use a different bus for each of these displays.

Diagram that shows iMac Pro ports and the buses they belong to.

When you start up your iMac Pro, the built-in display illuminates. Other connected displays show an image after your Mac is finished starting up. If one or more displays don't show an image after startup is complete, make sure that your displays and any display adaptors are connected properly.

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