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Will an iMac drive a Seiki 4K display?

I too just paid for SwitchResX and still nothing. I am trying to select it from Settings>Display but nothing. Double clicking it does nothing.

Will try a different cable...Using a Amazon one.

As per the picture, don't know what now : (
 

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Omg progress

Progress! As per picture, but the TV says invalid format!
 

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Nice! What did you have to use for the timings?

I'd also be curious if anyone ever manages to eak out > 30Hz from their displays. I think it should be possible to get at least 35Hz out of the mac / accel adapter, but cant get my display to ever lock that fast.
 
Was about to watch a movie from the Laptop, noticed it was 24Hz, thought what the hell, will try it, then boom. Now the entire thing doesn't work again when I added a custom 24Hz resolution.
 
mrkennethtong said:
Was about to watch a movie from the Laptop, noticed it was 24Hz, thought what the hell, will try it, then boom. Now the entire thing doesn't work again when I added a custom 24Hz resolution.
Click to expand...

Your display probably can't handle that mode. This page describes the way to recover fairly well:

http://www.madrau.com/support/faq/files/Ive_defined_a_new_resolution_an.html
At the time I hadn't found this page, and did the last one (but with a different monitor hooked up), which allowed me to boot as normal.
 
Am I correct in understanding that some of you are able to get things working right out of the box using the Accell active adaptor without using the patch or SwitchResX?

I have the 39in Seiki hooked up to a brand new MacMini using the Accell adaptor and something weird is happening. When I first boot up the mini, the TV shows that its at 3840 x 2160 and given the size of the Apple logo at start up it seems to be true. Then the whole thing blanks out for a minute and drops back down to 1080p.

Any thoughts?

I did previously get it work using the patch and SwitchResX on my old iMac as a second screen but it was clearly overloading the machine a bit and I couldn't get the refresh rate high enough. Just now I tried it on the MacMini with patch and SwitchResX and I get half a screen lit up with a bunch of semi-translucent horizontal lines and a compressed version of my desktop behind it.
 
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I had SwitchResX installed on my mac mini (2011), but hadn't been using an override to make the 3840x2160x30Hz - that mode just appeared and worked. I *did* do a test on a coworkers rMBP who had never used SwitchResX, and in that case it also went straight to 3840x2160x30Hz on the accel adapter.

As an experiment, I just hooked up my coworkers mac mini (2012) with the accel adapter, and his did not show the 3840x2160x30Hz mode - that behaved almost exactly as you described - inside OSX it locked at 1080p, but the bootscreen locked to UHD.

Maybe you do need SwitchResX afterall when using the Intel-based video (my mini had ATI). It could be all you need to do is disable the HDMI 1.3a in switchresx...?

(NOTE: Installing SwitchResX on my coworkers machine wasn't an option or I'd have tested...)
 
I just tried disabling HDMI 1.3a and all I still get is the garbled half screen. I just tried rebooting into it at UHD resolution and its still the half screen and now I can't reach the login box. So I'm off to the office to try to hook this think up to a different monitor and restore it back to a usable resolution.

Any other thoughts or suggestions? Ironically it did get UHD when I used my 2.9GHz i7 iMac which is about 3 years old; not well, but at least it worked.
 
genebob said:
I just tried disabling HDMI 1.3a and all I still get is the garbled half screen. I just tried rebooting into it at UHD resolution and its still the half screen and now I can't reach the login box. So I'm off to the office to try to hook this think up to a different monitor and restore it back to a usable resolution.

Any other thoughts or suggestions? Ironically it did get UHD when I used my 2.9GHz i7 iMac which is about 3 years old; not well, but at least it worked.
Click to expand...
Make sure the Underscan slider in Displays in System Preferences is set to Off.
 
iSayuSay said:
Seiki brand name itself might be shoddy as hell. But they're a good thing to control 4K display tech.

Otherwise the bunch of electronic giants would charge you $3000 on 42" display for the 4K alone. I really really get nauseous by the way they act.

Remember the 3DTV fad? Yeah I'm glad it turned out to be a big fail, and at one point, it was $2000 for 42" just because it has fad technology called "active 3D" and they want $200 for a mere pair of [active 3D glass] alone.

3DTV is not a fad. Just because not many people have one doesn't mean it's a fad. All the major studios shoot movies in 3D still. 4k 3D would be awesome.
Click to expand...
 
postalp said:
3DTV is not a fad. Just because not many people have one doesn't mean it's a fad. All the major studios shoot movies in 3D still. 4k 3D would be awesome.
Click to expand...

Oh I'm sorry I didn't get the memo that ALL major studios shoot movie in 3D.

That must be why many of 3D movies are nothing more than colorful cartoon for kids with low quality plotline.

Most quality movies with great story and direction need not and should not be 3d.
 
Wanted: Accell B086B-008B-2 (UltraAV Mini DisplayPort 1.1 to HDMI 1.4 Active Adapter)

Ok if anyone of you guys have a Accell B086B-008B-2 (UltraAV Mini DisplayPort 1.1 to HDMI 1.4 Active Adapter). I will pay $100 + Shipping

Please advise if anyone of you guys want to sell your Accell B086B-008B-2
 
I have the same problem... It seems like the latest gen mini without ATI card is only able to go up to 18Hz refresh at 4k. The older minis with ATI cards are able to go to 30Hz. :-(

18Hz is the only custom mode on switchresx that seems to work on the Mini. Anything lower causes the crazy 1/2 screen issues and anything higher comes back as 'unsupported' after a reboot.

Interesting I also notice that right at boot the Apple logo is at 4k 30Hz for a brief moment before screen goes black.

rMBP 15 works with 4k res right out of the box with no need for switchresx.

I'm using the active Accell adapter like everyone else.

genebob said:
Am I correct in understanding that some of you are able to get things working right out of the box using the Accell active adaptor without using the patch or SwitchResX?

I have the 39in Seiki hooked up to a brand new MacMini using the Accell adaptor and something weird is happening. When I first boot up the mini, the TV shows that its at 3840 x 2160 and given the size of the Apple logo at start up it seems to be true. Then the whole thing blanks out for a minute and drops back down to 1080p.

Any thoughts?

I did previously get it work using the patch and SwitchResX on my old iMac as a second screen but it was clearly overloading the machine a bit and I couldn't get the refresh rate high enough. Just now I tried it on the MacMini with patch and SwitchResX and I get half a screen lit up with a bunch of semi-translucent horizontal lines and a compressed version of my desktop behind it.
Click to expand...
 
Late 2012 Mac Mini - Same deal

I have the same issue with the late 2012 mini. Everything works perfect out of the box at 30hz on my late 2013 rMBP 15". The previous patch that enables over 165hz only works on <10.9 and the author hasn't figured out a way to enable this yet on 10.9+. If anyone figures it out, post it please. ;-)

Here is how it was done on 10.8.3,4,5 from the terminal on the late 2012 mini

sudo perl -i.bak -pe '$before = qr"\x0F\x85\xDE\x03\x00\x00"s;s/$before/\xE9\xC5\x03\x00\x00\x90/g' /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
sudo touch /System/Library/Extensions
 
Late 2011 MacBook 17" 4K

Has anyone been able to get 4k@30hz using the accell adapter with any 2011 macbook and a 6770m/6750m? I want to be able to use it as a second display and just want to check before I purchase the 39" seiki.

Also has anyone tried hdpi mode?
 
WooHu said:
Has anyone been able to get 4k@30hz using the accell adapter with any 2011 macbook and a 6770m/6750m? I want to be able to use it as a second display and just want to check before I purchase the 39" seiki.

Also has anyone tried hdpi mode?
Click to expand...

Threadbump, Curious about this same thing for the 6750m 1gb video card on the 2011 mbp 15", in theory it should work.
 
Hi guys, I found an interesting issue on my 13" rMBP (Intel HD4000) where the EFI (boot screen) will support 4k@30Hz (with Accel Active Adapter) but once OSX boots up it's back to 1080p.

When looking at System Info, the Displays section shows Adapter Type: DVI or HDMI. I believe this is why the Pixel Clock is limited to 165 MHz, the computer thinks you're on an HDMI connection so it artificially limits you to 165MHz. If it wasn't for this, Mavericks should probably be able to support 4k@30Hz as evidenced by the EFI supporting it briefly during boot.

So now the question remains: how do we get the computer to detect the Accel adapter as DisplayPort instead of HDMI?
 
13" retina mbp with seiki 4k ?

Hi, i second this question : will it works well at 3840 * 2160 with the retina 13"screen (intel 4000 hd graphics) ??
 
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