M1 Mini resolution and refresh
What resolutions and refresh rates will the M1 Mini support on HDMI? Planning to run an LG 27" 4K monitor.
Mac mini 2018 or later
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HDMI supports 4K resolution at 60Hz
Higher resolutions and refresh rates require USB-C to USB-C or USB-C to DisplayPort connections
Check out the "Video Support" for the M1 Mac mini at > Mac mini - Technical Specifications - Apple
For the full scoop about the M1 connection options, see > Connect a display to Mac mini - Apple Support