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4K at 60Hz on 12" rMB Hack: Monitors, Cables & Adapters That Work

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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
johndeere768 said:
Pushing it a little bit and probably know the answer but has anyone tried connecting 2 X 4K monitor running at 60hz through that ACER dock with the Macbook in clam shell mode? The dock does have a DP and HDMI port, just curious to see if its possible.

Thanks in advance.
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Sorry, I can't test this, because I have only one 4k screen.
 
Hung_Solo said:
unfortunately there isn't. The patch only allows 1920x1080 HiDPI and then 4k at 60hz.

I just had to unpatch my MacBook as after two solid weeks of using the patch with this monitor at 60hz my MacBook gets extremely hot (up to 37 degrees celsius).
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Err... I currently have just Safari and iTunes running and my temp on an UNPATCHED Macbook is 47 celsius. When I did some testing with very very heavy load, again, on an unpatched Macbook, I managed to get it to 80c. 37c is nothing at all.
 
Anyone installed macOS sierra yet?

Just finished and I'm now running 60hz with no patch on my LG 27UD88
 
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dasb0t said:
After the 10.12 Sierra there seems to be now all the scaled options available for Retina MacBook that were for MacBook Pro 4k-display combo already before. That "looks like 2560x1440" was not there before. Now it is and working 60hz which is pretty nice. I have early 2016 base model of the MacBook.

https://www.dropbox.com/s/sw43t65ywebh9f5/Screen Shot 2016-09-22 at 10.33.32.png?dl=0
Click to expand...

I noticed that throughout the betas, but they seem to go away if the computer goes to sleep and/or disconnected and reconnected.

(So I'm not sure if it was a bug that it shows, or a bug that they don't consistently show).
 
apb87 said:
I noticed that throughout the betas, but they seem to go away if the computer goes to sleep and/or disconnected and reconnected.

(So I'm not sure if it was a bug that it shows, or a bug that they don't consistently show).
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So I just had a kernel panic when waking my MacBook from sleep and plugging it into my monitor. So it seems that is still an issue with waking the MacBook up and plugging an external display.
 
Hung_Solo said:
So I just had a kernel panic when waking my MacBook from sleep and plugging it into my monitor. So it seems that is still an issue with waking the MacBook up and plugging an external display.
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I'm wondering if the kernel panic is caused by the display initially being set to a resolution (i.e. 2560x1440 hi dpi) and after sleep, waking back up and attempting to set that (now invalid) resolution. I have the same LG monitor and have had to restart the machine often when coming back after a break or after the laptop is put to sleep manually. When it doesn't kernel panic, it just has a black screen and I hold down the power button. Sounds like a driver issue or something.
 
apb87 said:
I'm wondering if the kernel panic is caused by the display initially being set to a resolution (i.e. 2560x1440 hi dpi) and after sleep, waking back up and attempting to set that (now invalid) resolution. I have the same LG monitor and have had to restart the machine often when coming back after a break or after the laptop is put to sleep manually. When it doesn't kernel panic, it just has a black screen and I hold down the power button. Sounds like a driver issue or something.
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The past two weeks before I went to sleep I now shut down my MacBook. Every time I get home and turn it on and plug in the LG monitor I have zero issues. I have put my MacBook back to sleep with the monitor plugged in so when I get home I'll see if the kernel panic happens again. If it does then its pretty apparent now what the issue is.
 
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I can confirm that after upgrading to Sierra, there are more scaling options like 2560 x 1440 on my LG 4K screen, but after waking the computer up from sleep, the options are gone and it defaults back to 1920 x 1080 HiDPI res. A restart solves the issue so I'm sure there are more bugs to be worked out. Since the whole 4K 60hz limitation was due to issue with bandwidth, does this mean that being able to drive 4K at 60hz natively makes the USB back to 2.0 speed? Can anyone test or verify?
 
Hung_Solo said:
The past two weeks before I went to sleep I now shut down my MacBook. Every time I get home and turn it on and plug in the LG monitor I have zero issues. I have put my MacBook back to sleep with the monitor plugged in so when I get home I'll see if the kernel panic happens again. If it does then its pretty apparent now what the issue is.
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Yea i never thought of just shutting it down. _#
Outrigger said:
I can confirm that after upgrading to Sierra, there are more scaling options like 2560 x 1440 on my LG 4K screen, but after waking the computer up from sleep, the options are gone and it defaults back to 1920 x 1080 HiDPI res. A restart solves the issue so I'm sure there are more bugs to be worked out. Since the whole 4K 60hz limitation was due to issue with bandwidth, does this mean that being able to drive 4K at 60hz natively makes the USB back to 2.0 speed? Can anyone test or verify?
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Yes, I have it plugged into a 4k LG @ 60Hz and the USB 3.0 Bus in the system report shows a speed of up to 480 Mb/sec, which is 2.0.

I still don't know if Sierra actually supports 60Hz OOB or not, or if it's just because the patch had been installed at one point in the past.
 
apb87 said:
I still don't know if Sierra actually supports 60Hz OOB or not, or if it's just because the patch had been installed at one point in the past.
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Plugging my 2015 MB into my Dell P2715q I get only 30hz out of the box.
 
apb87 said:
Yea i never thought of just shutting it down. _#


Yes, I have it plugged into a 4k LG @ 60Hz and the USB 3.0 Bus in the system report shows a speed of up to 480 Mb/sec, which is 2.0.

I still don't know if Sierra actually supports 60Hz OOB or not, or if it's just because the patch had been installed at one point in the past.
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I have the patch installed prior to Sierra, so its possible the patch stuck. Its simple to run a command to check status in terminal, although I assumed that upgrading the OS would erase any patches.
 
Outrigger said:
I have the patch installed prior to Sierra, so its possible the patch stuck. Its simple to run a command to check status in terminal, although I assumed that upgrading the OS would erase any patches.
Click to expand...

Me too, I wanted to unapply the patch to see if the sleep-wake/kernel panics stopped, but the patch removal script no longer seems to be aware that the patch is installed. So I guess I can either clean install, or just use it as is and see if it stops happening at some point in the beta cycle.
 
Outrigger said:
I have the patch installed prior to Sierra, so its possible the patch stuck. Its simple to run a command to check status in terminal, although I assumed that upgrading the OS would erase any patches.
Click to expand...

From what Floris stated (Creator of patch) that any update to the OS would remove the patch:

"Every install or update to the OS will wipe the patch. That is why i need to update it for every version :)

Most of the time I'm very fast with updating the script!" - Floris497
 
Outrigger said:
I have the patch installed prior to Sierra, so its possible the patch stuck. Its simple to run a command to check status in terminal, although I assumed that upgrading the OS would erase any patches.
Click to expand...

apb87 said:
Me too, I wanted to unapply the patch to see if the sleep-wake/kernel panics stopped, but the patch removal script no longer seems to be aware that the patch is installed. So I guess I can either clean install, or just use it as is and see if it stops happening at some point in the beta cycle.
Click to expand...
I've never installed the 60Hz patch on my machine and after Seirra update I get 60Hz @ 4K.
 
doboy said:
I've never installed the 60Hz patch on my machine and after Seirra update I get 60Hz @ 4K.
Click to expand...

so it would seem that in Sierra automatically applies the 60hz when you attach it to a 4k display and bring the USB speed down to 2.0.
 
I have a Early 2016 Macbook and an LG 27UD88-W arriving this coming week.

Will my apple supplied USB-C cable work for 4k60Hz and charging, or do I need to purchase the Monoprice cable?
 
Dunbar said:
My 2015 base does 4k@60Hz with Sierra installed. I really like the 2560x1440 option on my LG 4K monitor.
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Do you lose that option whenever you unplug the monitor from the rMB or wake it up from sleep?
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currocj said:
I have a Early 2016 Macbook and an LG 27UD88-W arriving this coming week.

Will my apple supplied USB-C cable work for 4k60Hz and charging, or do I need to purchase the Monoprice cable?
Click to expand...

A USB C to USB C cable comes with the monitor which works just fine.
 
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