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Yes, the iMac MRQY2LL/A (Retina 4K, 21.5-inch, 2019) can support a second display. Here’s what you need to know: 1. Port to use – This iMac has a Thunderbolt 3 / USB-C port that supports video output. 2. Maximum resolution – You can connect one external display up to 4096×2304 at 60Hz. 3. Cable/Adapter – Depending on your monitor’s input, you may need a USB-C to DisplayPort or USB-C to HDMI adapter/cable. Simply connect your external monitor via the correct cable/adapter, then go to System Settings → Displays to configure mirroring or extended desktop.
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