Classroom projection

Computer Projection

Wireless Projection


If you are using a Mac in a classroom equipped with an Apple TV for projection, you should use AirPlay mirroring bulit-in to Mac OS X. This wirelessly projects images, video, and sound. Press the Apple button on the wall panel to select the Apple TV and follow the directions from Apple here.


If you are using a Windows computer, classroom projectors are also connected to WPS/WiD devices for wireless projection. In most classrooms, sound can also be wirelessly projected using WPS/WID. If you received your school-issued computer after July 2014, the correct software should be installed on your machine. It is called WID and it has a green icon. The Black icon will not work on the new WPS/WID devices.

To install this software or for troubleshooting advice... go here: Wireless Presentation System

Wired (VGA) projection

Any device with a VGA port can be connected to the wired projection port/cable in classrooms. Connect the (usually) black VGA cable in the room to your computer and the wall panel, then select the wall control button labeled VGA, Laptop, or PC (not Tablet PC, Apple nor WPS). Finally, follow the directions below for Windows or Mac OSX if the image does not automatically appear. In order to send sound through the classroom speakers, you also need to connect the second, thinner part of the black cable to your computer headphone jack (and makes sure the other end of the thin headphone cable is plugged into the wall.)


(This works in Windows 7 and later.)

For Lenovo laptops, you will need an HDMI to VGA adapter. (Teachers can get one in the Taub Center.) Sometimes your screen will automatically display after you plug in the VGA cable and select the correct button on the wall panel. If it does not, hold down the "Window" button on the keyboard and press P. (Windows button is usually a key or two to the left of the space bar.) Choose Duplicate.


You will need an adapter that provides a VGA port. All teachers who were issued a school-owned MacBook Air were also given a Thunderbolt to VGA adapter for this purpose. Do the following on the Mac in order to mirror the display if it does not display automatically.

  1. Go to System Preferences > Displays
  2. Click the Arrangement button at the top of the window.
  3. Check the box labeled "mirror displays."

Note that mirroring to a VGA connected projector via wire is NOT THE SAME THING as AirPlay Mirroring.

If you get video but no sound, make sure the Sound Output setting (System Preferences > Sound > Output) is correct. (The WID software sometimes resets this incorrectly after use.) For wired, VGA projection, the sound output should be set to headphone jack.

iPad and Mac Projection

Most on-campus classrooms are equipped for wireless iPad and Mac projection using an Apple TV device. Use the Apple button on the wall panel to select the Apple TV. To connect to the Apple TV and project using AirPlay on an iPad or Mac, follow the directions from Apple here.

Note that WPS/WID is a 32-bit app so it does not run on a Mac with macOS Catalina/10.15 (released Oct 2019) so AirPlay to an Apple TV is recommended instead.

Apple TV Troubleshooting

If your room does not show up on iPad or Mac:

  1. Restart the Apple TV (This is the most common solution.)
  2. Ensure that AirPlay is enabled in Settings on the Apple TV (Settings > AirPlay > On).

How to restart an Apple TV

Apple TV projection problems are frequently fixed by restarting the Apple TV. These problems may include it disconnecting after a short period of use. An Apple TV remote is required for restart. They are usually silver. (Teachers can get an Apple TV remote in the Taub Center.) In the Hajjar STEM building, a software version of the remote is a feature of the AV panel.

    1. Aim remote at the projector. (Sometimes aiming at the screen works but not always.)
    2. Press the menu button on the remote.
    3. Use the black touch-pad ring on the remote to navigate to the Settings "gear wheel" and press the silver button in the middle of that to select Settings. (Settings is usually near the top of the list of icons that show on the first menu.)
    4. Using the same ring and circle for navigation and selection, choose the General menu then scroll down to select Restart (not reset).