bob browne
Level 1 (55 points)

Q: display setting don't stay

I have an LCD display connected to my Mac Mini by Thunderbolt and a projector connected by HDMI. Both work, but the resolution stays for both displays. I found the 'detect display' button, clicked it and it does nothing. I have set the correct resolution for each display in the display preference panel, but when I switch on the projector, it uses the LCD's resolution and when I switch to the correct resolution, the LCD resolution changes. I would just like the correct resolution to be used for each display. What is wrong?

Mac mini, OS X Mavericks (10.9.2)

Posted on Jun 15, 2014 4:44 AM

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bob browne

Q: display setting don't stay

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  • Helpful answers

  • by Linc Davis,Helpful

    Linc Davis Linc Davis Jun 15, 2014 7:29 AM in response to bob browne
    Level 10 (208,000 points)
    Applications
    Jun 15, 2014 7:29 AM in response to bob browne

    Back up all data.

    This procedure will unlock all your user files (not system files) and reset their ownership, permissions, and access controls to the default. If you've intentionally set special values for those attributes on any of your files, they will be reverted. In that case, either stop here, or be prepared to recreate the settings if necessary. Do so only after verifying that those settings didn't cause the problem. If none of this is meaningful to you, you don't need to worry about it, but you do need to follow the instructions below.

    Start up in Recovery mode. When the OS X Utilities screen appears, select

    Utilities ▹ Terminal

    from the menu bar. A Terminal window will open. In that window, type this:

     

    res

    Press the tab key. The partial command you typed will automatically be completed to this:

     

    resetpassword

    Press return. A Reset Password window will open. You’re not going to reset a password.

    Select your startup volume ("Macintosh HD," unless you gave it a different name) if not already selected.

    Select your username from the menu labeled Select the user account if not already selected.

    Under Reset Home Directory Permissions and ACLs, click the Reset button.

    Select

    ▹ Restart

    from the menu bar.

  • by den.thed,Helpful

    den.thed den.thed Jun 15, 2014 9:05 AM in response to bob browne
    Level 7 (27,639 points)
    Jun 15, 2014 9:05 AM in response to bob browne

    Are you running in Mirroring or Extended Desktop Mode...?

     

    In that setup, only Extended Desktop Mode allows you to choose seperate resolutions for dual monitors (or monitor and projector) in your case.

     

    Go to: OS X: Using multiple displays in Mavericks, then expand and have a look at the Video Mirroring section.

     

    Screen Shot 2014-06-15 at 8.55.21 AM.jpg

  • by bob browne,

    bob browne bob browne Jun 15, 2014 1:46 PM in response to den.thed
    Level 1 (55 points)
    Jun 15, 2014 1:46 PM in response to den.thed

    Thanks to both of you for the helpful replies. I'll try both until I get the correct result.

  • by den.thed,

    den.thed den.thed Jun 15, 2014 2:55 PM in response to bob browne
    Level 7 (27,639 points)
    Jun 15, 2014 2:55 PM in response to bob browne

    You are welcome!

     

    You might find that Extended Desktop works better, but that it is a little tricky at first. Your best bet using Extended Desktop, is to setup the Thunderbolt monitor as the primary monitor and the projector as the secondary monitor. Then drag App windows from the primary monitor to the secondary monitor or in your case the projector. The only drawback to that is if you are using the projector for a presentation or a lecture..? If so then you will have to look at the projected image instead of the Monitor.