External monitor display issue macbook

eydnou -  
 tibooobit -
Hello,

I have a problem when I connect a projector to my MacBook. On the projection screen, only my desktop wallpaper appears without any icons or anything at all. To see a PowerPoint, I have to launch it in slideshow mode to see something. But when I want to play a movie, using QuickTime Player for example, it doesn't work. I can see it on my computer screen, but on the big screen, there's only my wallpaper (desktop without icons). However, I noticed that when I go into system preferences, in certain tabs, the windows display on both screens. It's a bit strange because not long ago, on the same projector, I had exactly my computer screen on the big screen and I could see everything I was doing. Do you have any idea what could be the issue?
Is it possible that a configuration setting changed by itself? Other people have used the projector; could they have messed up something?

Thanks in advance for your help.
Configuration: Mac OS X Safari 531.9

5 answers

  1. caipirinha Posted messages 1138 Registration date   Status Member Last intervention   227
     
    Hello.

    You go to Preferences/Monitor
    In the "Layout" tab, you check "Video Mirroring" at the bottom left.

    --
    In order: Manual - Google - Forum. And not the other way around.
    90% of the problems are caused by what is between the keyboard and the chair.
    0
  2. eydnou
     
    Thank you for your response, but actually in monitors I don't have a layout tab. Is it possible that this tab only appears when the computer is connected to an external monitor?
    0
  3. eydnou
     
    Hi,

    Sorry for not getting back to you sooner, but actually yesterday I tried again with the beamer and this time I had the layout tab (it only shows up when it's connected to a monitor apparently), I clicked on video mirroring and it works!
    So thank you very much!

    See you soon.
    0
  4. tibooobit
     
    Hi,
    normally, you just need to drag your windows to the far right of your computer screen for them to appear on the external monitor.
    I hope this helps,
    0
  5. caipirinha Posted messages 1138 Registration date   Status Member Last intervention   227
     
    Ah. It’s getting complicated.

    Is it possible for you to test a computer command on this same projector?

    --
    In that order: Manual - Google - Forum. And not the other way around.
    90% of problems are due to what’s between the keyboard and the chair.
    -1