meremoo

Q: Thunderbolt Not Working With El Capitan

I bought a thunderbolt to hdmi cord to connect my mac air to my classroom smart tv. My computer is not showing anything on the display, however,  three of my students with the same computer are not having any issues. The only difference that I can find is that I have updated to El Capitan and they have not. Is this just a bug that needs to be fixed or are there steps I can take to correct it myself?

MacBook Air, OS X El Capitan (10.11.1), Thunderbolt

Posted on Dec 8, 2015 4:53 AM

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Q: Thunderbolt Not Working With El Capitan

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  • by JimmyCMPIT,

    JimmyCMPIT JimmyCMPIT Dec 8, 2015 5:20 AM in response to meremoo
    Level 5 (7,491 points)
    Mac OS X
    Dec 8, 2015 5:20 AM in response to meremoo

    Mac OS X 10.11.1 breaks HDMI output (MacBook Pro 13")

    While the OP does not resolve the original issue he does point out an issue I've seen inherent to TB to HDMI, not necessarly exclusive to 10.11

     

    the earlier mac airs had USB 2.0 and Mini Display port out puts, the newer airs have USB 3.0 and TB ports. If you're all on the same model mac are you all on the same year mac?

    While it could also be the computer, the OS, the HDMI cable, or even the display you are trying to connect to have you tried a different model adapter?

    Do you see any options for the display on your Display prefs? Have you tried tried any other resolutions that may be hidden from your selection unless you OPT+LMB on the "SCALED" radio button?

     

    Screen Shot 2015-12-08 at 8.19.03 AM.png

    w/o option held

     

     

    Screen Shot 2015-12-08 at 8.19.11 AM.png

    with option held

     

    Apple Mini DisplayPort adapters: Frequently asked questions (FAQ) - Apple Support

    http://www.apple.com/thunderbolt/

  • by meremoo,

    meremoo meremoo Dec 8, 2015 6:23 AM in response to JimmyCMPIT
    Level 1 (0 points)
    Dec 8, 2015 6:23 AM in response to JimmyCMPIT

    One of my students has an early 2014 mac air and mine is an early 2015 so that might make a difference.

     

    My computer isn't registering that anything is connected to my TB port at all. Even when I hold options and press "detect displays".  I even searched the thunderbolt under system report and while I have my computer plugged to the TB and the tv. Also, when I look at my scaled list, 1080p is not available.

     

    I honestly am lost. Thank you tremendously for your help!!

  • by JimmyCMPIT,

    JimmyCMPIT JimmyCMPIT Dec 8, 2015 6:30 AM in response to meremoo
    Level 5 (7,491 points)
    Mac OS X
    Dec 8, 2015 6:30 AM in response to meremoo

    if possible see if you can make an appointment with an apple store rep though apple

    it may be the TB port doesn't recognize the adapter which could be the adapter or the port. If there is a problem with the port and you are under warranty you may be eligible for a replacement logic board which is in your best interest go get done before the warranty runs out. if it's the cable you may just have a finicky port and the cable is the issue.