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My External Monitor Stopped Working After Catalina Update

After I updated my Macbook Pro OS to the new macOS Catalina version 10.15.3, My external monitor is not being found. I plugged in my sisters new Macbook pro which she hasn't updated and it works fine.


Would anyone be able to figure out why this is happening?

MacBook Pro 13", macOS 10.15

Posted on Feb 23, 2020 4:43 AM

Reply
Question marked as Top-ranking reply

Posted on Feb 23, 2020 6:00 AM

TomJayDev wrote:

After I updated my Macbook Pro OS to the new macOS Catalina version 10.15.3, My external monitor is not being found. I plugged in my sisters new Macbook pro which she hasn't updated and it works fine.

Would anyone be able to figure out why this is happening?


Get help with video issues on external displays connected to your Mac - Apple Support
 https://support.apple.com/en-us/HT201177


Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

and

Try resetting the SMC https://support.apple.com/en-us/HT201295


1 reply
Question marked as Top-ranking reply

Feb 23, 2020 6:00 AM in response to TomJayDev

TomJayDev wrote:

After I updated my Macbook Pro OS to the new macOS Catalina version 10.15.3, My external monitor is not being found. I plugged in my sisters new Macbook pro which she hasn't updated and it works fine.

Would anyone be able to figure out why this is happening?


Get help with video issues on external displays connected to your Mac - Apple Support
 https://support.apple.com/en-us/HT201177


Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

and

Try resetting the SMC https://support.apple.com/en-us/HT201295


My External Monitor Stopped Working After Catalina Update

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