2 Replies Latest reply: Dec 6, 2010 2:20 AM by nachdenki
seemein3d Level 1 Level 1
I currently have an iMac 27" Intel Core 2 Duo model (November 2009) and whenever I connect to my HDTV via VGA I cannot set a resolution higher than 1600x1200 @ 60Hz.

I know the TV is capable of doing so. My MacBookPro 13" with the integrated Nvidia 9400m is capable of setting a resolution of 1920x1080 @ 60Hz.

I'm running 10.6.4 and have the ATI Radeon HD 4670. I've tried SwitchResX and whenever I attempt to create a custom resolution, I'm told the resolution may be invalid.

I'm looking for a solution so I may leave my 27" iMac connected to my HDTV on a somewhat permanent basis. Any help is appreciated.

Thank you.

iMac 27", Mac OS X (10.6.4)
  • grafxboy.mac Level 1 Level 1

    I don't know that I can answer your question, as I am currently researching video I/O capabilities for my own 27" iMac. But, I did notice something in your post that might help.

    Your HDTV should have a multitude of inputs, but your trying to connect via VGA possibly because you are already using the rest for other devices?

    I would suggest trying to connect using one of the digital connectors, HDMI, DVI, or even S-Video. Even the cheaper and/or smaller HDTVs usually have at least 2 HDMI inputs. If you are already using both, temporarily disconnect one of them, connect it to your iMac, and see if you can get it to display 1080.

    I would love to have one of the experts weigh in on this one, as this is one of my video output questions. Thanks.
  • nachdenki Level 3 Level 3
    I'm surprised it even goes that high. VGA only supports much lower resolution as far as I know.
    anyway, as pointed out before, definitely either go MDP->HDMI or MDP->DVI->HDMI and you should be fine.