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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="ferrarr" data-source="post: 1831990" data-attributes="member: 376394"><p>Was the display connected when you did the upgrade? I usually disconnect devices when doing the upgrade. </p><p></p><p>I would try an SMC and NVRAm reset. </p><p></p><p>SMC, <a href="https://support.apple.com/en-us/HT201295" target="_blank">How to reset the System Management Controller (SMC) on your Mac - Apple Support</a> </p><p>NVRAM, <a href="https://support.apple.com/en-us/HT204063" target="_blank">Reset NVRAM or PRAM on your Mac - Apple Support</a></p></blockquote><p></p>
[QUOTE="ferrarr, post: 1831990, member: 376394"] Was the display connected when you did the upgrade? I usually disconnect devices when doing the upgrade. I would try an SMC and NVRAm reset. SMC, [url=https://support.apple.com/en-us/HT201295]How to reset the System Management Controller (SMC) on your Mac - Apple Support[/url] NVRAM, [url=https://support.apple.com/en-us/HT204063]Reset NVRAM or PRAM on your Mac - Apple Support[/url] [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Black Screen on External Display After Update to Catalina
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