Display Preferences does not detect dual monitors

Display Preferences does not detect dual monitors.
There is no workaround here.
Only a prompt update from apple will solve this.
Any level 5 geniuses I welcome your guidance... please prove me otherwise.
thanks
--Marconi

Hi marconi de baloni,
Thanks for the question. Based on what you stated, it seems like the computer is not recognizing a second display. I would recommend that you read this article, it may be able to help you resolve or isolate the issue.
OS X Yosemite: Connect multiple displays to your Mac
If a display is not recognized, choose Apple menu > System Preferences on the primary Mac, click Displays, then click Display.
Open the Display pane for me
Then click the Detect Displays button.
You can also try putting your Mac to sleep and then waking it.
Thanks for using Apple Support Communities.
Cheers,
Mario

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