My Mac thinks my Monitor is a TV ?

Discussion in 'Mac mini' started by Sean869, Dec 7, 2012.

  1. Sean869 macrumors member


    Nov 7, 2012
    Dorset, United Kingdom
    I have been experiencing problems with the monitor on my late 2012 Mac Mini.(I7 2.3) I have an AOC i2353 23” IPS monitor connected with a Thunderbolt / HDMI cable, and the colours are to be fair rubbish. I have read several threads about “Crushed Whites” but I’m not sure I have the same problem.

    I have looked in ‘System Report’ and for some reason my mac thinks it’s connected to a television. (I have attached a screen shot)

    Could it be that my Mac is outputting a television signal that my monitor is having trouble dealing with ?
    Also how do I tell my Mac that its not a television ?

    I have already tried to calibrate my display several times and nothing seems to work. AOC don’t seem to do a mac specific driver

    Im new to Macs having only bought this one a few weeks ago and would appreciate any help you could give.

    Attached Files:

  2. fa8362 macrumors 65816

    Jul 7, 2008
    I'm guessing it's going to say "television" for any 1920 x 1080 display, so you shouldn't worry about it.
  3. motrek macrumors 68020

    Sep 14, 2012
    I just checked mine. I also have a 1080p display and it doesn't say television. There is no such thing as a television HDMI/DVI signal (i.e., the signal protocol to a TV is the same as to a computer monitor) although the computer may be outputting different colors.

    I think it's unlikely though because I've plugged my MacBook into a number of different TVs and the pictures on them all looked 'normal,' i.e., as if they were computer monitors.

    Have you tried changing the settings on your monitor? A lot of the problems about 'crushed whites' were with people using their Minis as HTPCs and they didn't have their TVs set up to faithfully reproduce the signal they were receiving. OS X doesn't look as good when your TV is set to Sports mode. :)
  4. ActionableMango macrumors G3


    Sep 21, 2010
    Computers normally output an RGB range of 0-255, and this is what computer monitors expect. Video equipment outputs an RGB range of 16-235, and this is what TVs expect.

    Today monitors, TVs, computers, and video equipment all use the same connectors, which causes problems when there is an RGB range mismatch.

    If your Mini thinks it is connected to a TV, it is probably sending RGB16-235, and your monitor is probably expecting 0-255. If this is the case, your whites and blacks probably look like crap and your colors probably don't look great either.

    You probably have an HDMI EDID issue. I don't know how to convince OS X that it is connected to a monitor (you can try switchresX maybe). It's usually easier to set the monitor to "RGB limited" in its video settings. Unfortunately the monitor might call this something else like "color space".

    You can also try to fix the EDID, assuming that is the problem, by using the following method, but it is not an easy process.

    Or, frankly, you may just have the 2012 Mac Mini crappy display problem everyone is having:
  5. DaLurker macrumors 6502

    Mar 30, 2006
    I used to have this issue with my Macbook Air and U2410 where I couldn't use a Thunderbolt --> HDMI or Thunderbolt to Displayport cable because it thought it's a Television. As far as I know its a driver issue as all Macbook Airs from my generation were affected.

    The only way to work around it was to use a Thunderbolt --> DVI adapter and then my monitor would be recognized properly and the colors would be normal.

    Some googling reveals your monitor doesn't have a DVI port unfortunately. You should contact Apple for a solution as this will most likely require a drive update.

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