This gives me three displays

Can you hook up 2 monitors to an imac

Plug in and turn on

Grasp the card by the edges and pull it out of the card slot. After connecting everything, your Mac will begin mirroring its display to the new monitor automatically. Secure it in place with the clip at the bottom of the card and the two screws on the back of the card. Reconnect any other external devices to the Apple.

Both screens will go black for a brief moment. Typically, these are located in the lowermost slot, next to the memory bays. Gently lift the side panel off of the computer. After that, it just becomes a matter of how you want to use your iMac dual monitor setup.

Some users report that the official adapters are more reliable, but I've had success with the third-party variety. Plug in each of the external monitors and turn on the power.

This is where you'll go to find out how to release your Mac's potential and make the most of your purchase. If you have Thunderbolt, you can daisy chain you monitors together, like mentioned in the other answer. Connect each of the displays to the inputs on the back of your computer's graphics card. Disconnect any external devices such as printers or monitors. Again, the displays will go black, then light back up to reflect the new settings.

Arrange your displays or change

Plug in and turn on the dual monitors. Arrange your displays or change your primary display So that you can move apps and windows across your displays in one continuous motion, arrange your displays to match the setup on your desk.

Close the case and secure the latch on the back. Gently press the card into the slot.

Turn on video mirroring Make sure that your external display is powered on and connected to your Mac. Install any new software as needed by the graphics card manufacturer. The cable will need to be plugged into the Mini DisplayPort or Thunderbolt port on your Macbook, and then again in the corresponding port on the iMac. Unplug the power cord from the back of the computer case.