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cameronreilly

Q: 10.11.6 broke external monitor

I have a 2015 MBP Retina with a Benq 27" LCD monitor connected via HDMI. Everything was working just dandy like candy until I updated OSX this morning and after the reboot - no monitor can be found. Tried SMC and NVRAM reset to no avail. Obviously powered the Mac and the monitor down and up several times too. Tried "Detect Displays" - nothing. Any ideas?

Macbook Pro, Mac OS X (10.5.3)

Posted on Jul 19, 2016 8:38 PM

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Q: 10.11.6 broke external monitor

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  • by Ulexes138,Helpful

    Ulexes138 Ulexes138 Jul 20, 2016 4:42 PM in response to cameronreilly
    Community Specialists
    Jul 20, 2016 4:42 PM in response to cameronreilly

    Hello cameronreilly,

     

    Thanks for reaching out to the Apple Support Community. I use an external monitor every day with my MacBook Pro, so I know how useful it can be, and I'll do all I can to help. You were off to a great start with resetting the SMC and NVRAM. From here what I'd recommend is starting up your Mac under a test user to see if the issue is specific to your user account or if it's system-wide. 

     

    To do this you can open your System Preferences and select "Users & Groups". Then click the padlock icon at the bottom and enter your password to unlock the options. Click the plus sign (+) to add a new user. Be sure to make that user an administrator. Once the account is set up, log out of your current account and into the new test user. If the monitor is not detected in the test user, I'd recommend reinstalling the update using recovery mode. This will not delete any files from your mac. This article will walk you through that process: How to reinstall OS X

     

    If you run into any trouble or have any questions, the entire community is here to help.


    -Best Regards.

  • by cameronreilly,

    cameronreilly cameronreilly Jul 20, 2016 4:43 PM in response to Ulexes138
    Level 1 (4 points)
    Mac OS X
    Jul 20, 2016 4:43 PM in response to Ulexes138

    Thanks Ulexes. Great idea to try a test account. Unfortunately the monitor still didn't work. However, after I posted my first message yesterday, the monitor *did* start working again, for no apparent reason, but today it has stopped again. I guess I'll try recovery mode. Thanks.