Connect multiple displays to your iMac (Retina 5K, 27-inch, 2020)

You can connect up to two 4K displays or two 6K displays using the two Thunderbolt 3 ports on your iMac.

Connect to 4K, 5K, and 6K displays

iMac supports up to one or two displays depending on the graphics card.

AMD Radeon Pro 5300 and AMD Radeon Pro 5500 XT

You can connect up to one 6K display or two 5K or 4K displays in these configurations:

  • One 6K display with resolutions of 6016 x 3384 10bpc @ 60Hz
  • One 5K display with a resolution of 5120 x 2880 10bpc @ 60Hz
  • Two 5K displays with resolutions of 5120 x 2880 8bpc @ 60Hz
  • Two 4K displays with resolutions of 3840x2160 10bpc @ 60Hz or 4096x2304 8 bpc @ 60Hz

AMD Radeon Pro 5700 and AMD Radeon Pro 5700 XT

You can connect up to two 6K, 5K, or 4K displays in these configurations:

  • Two 6K displays with resolutions of 6016 x 3384 10bpc @ 60Hz
  • One 5K display with resolution of 5120 x 2880 10bpc @ 60Hz
  • Two 5K displays with resolutions of 5120 x 2880 8bpc @ 60Hz
  • Two 4K displays with resolutions of 3840x2160 10bpc @ 60Hz or 4096x2304 8 bpc @ 60Hz

Starting up your iMac

When you start up your iMac, 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 your displays and any display adapters are connected properly.

Learn more

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