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iMac running latest Catalina. Thunderbolt port regularly loses signal via Apple HDMI adapter to second screen. Unplugging and replugging at Thunderbolt port reconnects. Unplugging and replugging at other points doesn’t reconnect. Source of problem and cure?
Is there a USB3 to HDMI adapter that doesn’t have this problem?
You might try resetting the SMC How to reset the SMC of your Mac - Apple Support
Last time I saw this it was a setting on the Monitor.
Thunderbolt port keeps losing connection to second screen
