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Apple Computing Products:
macOS - Operating System
Black Screen on External Display After Update to Catalina
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<blockquote data-quote="chscag" data-source="post: 1831939" data-attributes="member: 46727"><p>Thanks for posting the additional info. I have the same model iMac as you have but I do not use an external monitor nor do I have one to test with.</p><p></p><p>I suspect you're using an adapter since your NEC only has DVI and VGA inputs. Are you able to try connecting it another way? Or perhaps try another adapter/cable?</p></blockquote><p></p>
[QUOTE="chscag, post: 1831939, member: 46727"] Thanks for posting the additional info. I have the same model iMac as you have but I do not use an external monitor nor do I have one to test with. I suspect you're using an adapter since your NEC only has DVI and VGA inputs. Are you able to try connecting it another way? Or perhaps try another adapter/cable? [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Black Screen on External Display After Update to Catalina
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