External Monitor not working

Discussion in 'OS X Yosemite (10.10)' started by spektrality, Oct 19, 2014.

  1. spektrality macrumors newbie

    Oct 19, 2014
    Hi guys, I've got a mid-2012 Macbook Pro 15 inch, non-retina. Intel i7, Nvidia GT 650m, 8gb RAM, OS X 10.10.

    I've been using a 27 inch Acer monitor with a mini DisplayPort to HDMI adapter for several months now. After updating to Yosemite on Thursday, it was still working fine. Yesterday, however, the computer no longer recognizes the monitor. The screen flickers when I plug it in, but nothing displays on the larger screen.
    I know the monitor works, it displays my Xbox just fine. I've tried different HDMI cables to no avail. The only hardware left to test is the adapter, but I want to rule out software before I buy a new one to test it.

    Any suggestions? Thanks!
  2. skyrunner macrumors newbie

    Oct 26, 2014
    I have exactly the same issue with my Early 2011 MacBook Pro 15".
    I am using a mini disyplayport to hdmi adapter. Seems to be the same problem as yours.

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