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Can I add an additional Monitor to my iMac 27 inch ?

Model : "Retina 5K, 27 - inch, 2017".

Processor : 3.4 GHz Quad-Core Intel.

Graphics : Radeon Pro 570 4 GB.

Memory : 8GB 2400 MHz DDR4.

iMac 27″ 5K, macOS 13.6

Posted on Jan 16, 2024 1:06 AM

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3 replies

Jan 16, 2024 4:24 AM in response to Manish_Mohan

iMac (Retina 5K, 27-inch, 2017) - Technical Specifications


"Video Support and Camera

  • Simultaneously supports full native resolution on the built-in display at 1 billion colors and:
    • One 5120‑by‑2880 (5K) external display at 60Hz with support for 1 billion colors, or
    • Two 3840-by-2160 (4K UHD) external displays at 60Hz with support for 1 billion colors, or
    • Two 4096‑by‑2304 (4K) external displays at 60Hz with support for millions of colors
  • Thunderbolt 3 digital video output
  • Native DisplayPort output over USB‑C
  • Thunderbolt 2, HDMI, DVI, and VGA output supported using adapters (sold separately)"


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It's easy to find USB-C to {DisplayPort, Mini DisplayPort, HDMI} adapter cables on Amazon.


I would recommend looking for monitors that have IPS panels and near-100% coverage of sRGB. Vendors of the very cheapest 24" monitors often skimp and use TN panels (that may not have good viewing angles) – or panels that don't offer decent coverage of the "standard" sRGB color gamut. If you don't see these things in the specs, assume the worst.


I only know of a couple of 24" standalone monitors with 4K resolution and Retina-style pixel density. They're from LG, and they cost a lot more than good 24" 1920x1980 pixel monitors. It's not entirely clear why there are so few 24" UHD 4K monitors given how UHD 4K resolution is now so common in TV sets.

Can I add an additional Monitor to my iMac 27 inch ?

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