HT202856: Using 4K displays and Ultra HD TVs with your Mac
Learn about Using 4K displays and Ultra HD TVs with your Mac
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All replies
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Helpful answers
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Jun 3, 2014 1:29 PM in response to thehesiodby jimfromarlington,Yeah, definite mouse lag is visible at 30Hz, although I suppose if you use it long enough you'll get used to it. Personally, I moved the U28D590 to my Windows 8 system (where it works and looks great) and went back to the Thunderbolt Display on the Mac Pro until (if?) Apple can fix the AMD DisplayPort drivers (and it's definitely an AMD/OSX thing because those with NVIDIA GPUs in the Retina MacBook Pro are getting perfect 60Hz DisplayPort output).
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Jun 3, 2014 1:38 PM in response to jimfromarlingtonby thehesiod,I heard disabling vsync @ 30hz can help, mind trying? http://www.tonymacx86.com/customization/92201-beamsyncdropper-tool-disable-beams ync-permanently.html
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Jun 3, 2014 1:36 PM in response to jimfromarlingtonby Laseyman,Yeah, read one more thing that explained that just after I posted the reply. Still need to test with video etc, but I've just come off the crappiest little monitor you've ever seen that I was using as a stand in, so I'll let it sink in first before I make full judgement. I use a wacom tablet, so mouse lag isn't really something I'm concered about but with the magic mouse, yeah I guess so.
I thought the new Mac Pro was going to be the chosen one... it is in fact... Darth Vader.
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Jun 3, 2014 1:53 PM in response to thehesiodby jimfromarlington,thehesiod wrote:
I heard disabling vsync @ 30hz can help, mind trying? http://www.tonymacx86.com/customization/92201-beamsyncdropper-tool-disable-beams ync-permanently.html
Not at the office with the Mac Pro at the moment, but I'll give it a go tomorrow and report back.
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Jun 3, 2014 11:24 PM in response to jimfromarlingtonby Perry Rahbar,Hey guys, appreciate all the info on here but you're all way more advanced than I. I have a 2012 macbook pro and was looking to get a monitor anywhere from 27-40' range. The samsung 4k caught my eye, but i'm assuming my machine might be too old even with any new software updates that come out. any recommendations on what might be a great alternative? thanks in advance.
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Jun 4, 2014 8:23 PM in response to jimfromarlingtonby Thomas Isaacs,Has anyone tried running under 10.9.4 to see if its imporved?
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Jun 4, 2014 10:15 PM in response to Thomas Isaacsby Nomin Park,both 10.9.4 and 10.10 are not improved.
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Jun 5, 2014 12:37 PM in response to digitalcolemanby Laseyman,Also just found out that you sometimes have to unplug the power cable to get the screen working after booting up... under the desk I go... that's a pile of c-rap! Anyone else get that?
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Jun 5, 2014 1:36 PM in response to Laseymanby Grant Bennet-Alder,Try sleep-and wake your Mac instead.
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Jun 5, 2014 2:29 PM in response to Grant Bennet-Alderby Laseyman,Will do, shame to have to find work-arounds... I shut down my computer at night normally anyway. I'll see if the same problem comes up in sleep... I have disabled eco power, off timer and 'power led' is set to stand by.
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Jun 6, 2014 10:28 AM in response to digitalcolemanby neymo,Hi thanks for your posts
"2560x1440 looks fine"
how do you get a clean image on your samsung with display port and 2560x1440
i get the same multi image problem, as in 4k
thanks
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Jun 8, 2014 12:49 AM in response to neymoby joevt,Check the EDID of the monitor to make sure it supports a 2560x1440 timing mode, then use SwitchResX to create that timing mode (you'll have to figure out if the mode is GTF or CVT or CVT-RB). This should override the scaled mode that is automatically created by the Mac graphics driver.
I do this on my Apple 30" Cinema HD Display to enable the non-scaled 1280 x 800 mode that it supports (native resolution is 2560 x 1600).
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Jun 8, 2014 8:00 AM in response to joevtby Grant Bennet-Alder,Could you elaborate on how one Checks and/or compensates for the EDID? Or provide a link to an article on the subject for Macs?
Most readers have never had to look at any of this stuff. it used to "just work".
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Jun 8, 2014 2:31 PM in response to Grant Bennet-Alderby joevt,SwitchResX has an option to save the EDID of the display to a text file. The text file will list the limits of the monitor, and the standard resolutions it supports. Then use SwitchResX to add the timings that you want and restart your Mac. SwitchResX will tell you if the new timing was accepted.
I think 2560 x 1440 should look like this:
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Jun 8, 2014 7:02 PM in response to joevtby Grant Bennet-Alder,say, that is pretty cool.
SwitchRes is an old friend of Mac Users.
Do you know if it also fix the RGB problem some users are having with certain Dell 4K displays EDID-ing as TV sets, and getting wrong colors etc (they have needed a Ruby Script to force RGB mode).?
