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4K Display and Retina MacBook Pro 13"

jonisign said:
Hi,
With the 2013 13-inch Haswell rMBP it is possible to run at 3840x2160 or 1080P HiDPI over DisplayPort at 52Hz. This is because the max clock rate for the 13-inch over thunderbolt 2 is 450 MHz.

To get this resolution, use the settings in the screenshot I've made with switchresx (attached).

If you want 60Hz or even higher HiDPI settings, you can do this via picture by picture mode with a DP and a HDMI connector. There's an extensive thread on this in this forum.



Edit.. And yes, I did this with the same monitor you're using!
Click to expand...

I just purchased a Dell p2715q and am trying to set it up with my Early 2013 Retina MacBook Pro. I'm connecting to the monitor via a HDMI > Mini Display Port cable. I've disabled the SIP, installed SwitchResX and set up a new resolution as per the screenshot attached. Unfortunately, when I reboot and go back into SwitchResX it is not possible to active the custom resolution - the app gives an error "invalid resolution" ...if anyone has run into this problem (I'm running version 4.6) help would be appreciated! Everything is displaying as unacceptably fuzzy for a Retina-quality monitor and I'm about ready to send it back.
 
jmarie673 said:
I'm connecting to the monitor via a HDMI > Mini Display Port cable.
Click to expand...
- Just to confirm: You actually mean Mini DisplayPort to HDMI, correct? Meaning that you're using the Thunderbolt output on your Mac, not the HDMI output.

Still, you really should be using pure DisplayPort rather than HDMI in any form.
 
JTToft said:
- Just to confirm: You actually mean Mini DisplayPort to HDMI, correct? Meaning that you're using the Thunderbolt output on your Mac, not the HDMI output.

Still, you really should use pure DisplayPort rather than HDMI.
Click to expand...

Confirmed - Mini DisplayPort to HDMI. I also tried MDP to MDP but the monitor did not recognize it (black screen)
 
Yup! Thanks for checking. The monitor won't detect the connection in either DP or MDP modes.
 
jmarie673 said:
Yup! Thanks for checking. The monitor won't detect the connection in either DP or MDP modes.
Click to expand...
- And you're positive you're using the DisplayPort input and not the output on the monitor? There are two full-size DisplayPort ports, one input and one output.

And HDMI isn't involved anywhere in any of your connections? 'Cause that's bound to create issues.
 
Yes, I've just double-checked with both input and outputs for DisplayPort. The cable is a direct MDP to HDMI cable. There are two HDMI ports on the monitor and I've checked it against both of them.
[doublepost=1474583751][/doublepost]
jmarie673 said:
Yes, I've just double-checked with both input and outputs for DisplayPort. The cable is a direct MDP to HDMI cable. There are two HDMI ports on the monitor and I've checked it against both of them.
Click to expand...

Sorry! For all of the above I meant MDP to DP, not HDMI. The MDP to HDMI cable is the only one that I've had success with in connecting to the monitor.
 
jmarie673 said:
Yes, I've just double-checked with both input and outputs for DisplayPort. The cable is a direct MDP to HDMI cable. There are two HDMI ports on the monitor and I've checked it against both of them.
[doublepost=1474583751][/doublepost]

Sorry! For all of the above I meant MDP to DP, not HDMI. The MDP to HDMI cable is the only one that I've had success with in connecting to the monitor.
Click to expand...
- You're really confusing matters quite a bit. But if I'm understanding you correctly, pure DisplayPort doesn't function at all, and Mini DisplayPort to HDMI doesn't function properly.

If that's the case, you have a defect somewhere. Probably in the monitor.
Though what happens if you stay completely away from SwitchResX and similar utilities, just using default software and OS X functions?
 
DP to MDP sadly doesn't work. The only connection that does work is MDP to HDMI and the results are either poor, or highlighted as invalid by either the monitor or the multiple settings I've tried both with and without SwitchResX. Perhaps it is a defective monitor, or perhaps my MacBook (early 2013 as opposed to late 2013) simply isn't capable and/or needs another config that no one has suggested as of yet.
 
Ridiculous that on compatible Macs, Mac OS needs switchresx or some other program to get 4K at 60Hz to properly work (if that even does work, which it has not for me). Meanwhile, using bootcamp/Windows 10, it works fine without hassle.

I recently connected an HDMI 2.0 cable to an active adapter, and used the display port on my 4K iMac. In Mac OS, the highest I can go at native res is 30Hz. Using bootcamp it defaults to 60Hz perfectly (TV's native refresh rate). I understand the lack of hardware updates, but I don't understand why their software is now lagging behind.
 
jmarie673 said:
DP to MDP sadly doesn't work. The only connection that does work is MDP to HDMI and the results are either poor, or highlighted as invalid by either the monitor or the multiple settings I've tried both with and without SwitchResX. Perhaps it is a defective monitor, or perhaps my MacBook (early 2013 as opposed to late 2013) simply isn't capable and/or needs another config that no one has suggested as of yet.
Click to expand...

Yes the early 2013 only had hd4000 graphics and Tb 1 it will struggle with 4K tb1doesn't have the bandwidth for 4K and the hd4000 isn't up to the job either.
 
Samuelsan2001 said:
Yes the early 2013 only had hd4000 graphics and Tb 1 it will struggle with 4K tb1doesn't have the bandwidth for 4K and the hd4000 isn't up to the job either.
Click to expand...

I've got the p2415q running at 30hz on a 2012 mac mini no problem. Runs just as well as a late 2013 rMBP if not better.
 
I just updated my Macbook to Sierra (10.12) and the 1080p HiDPI setting has disappeared from my Switchresx menu... anyone else run into this?
 
Hey guys, sorry for bumping an old thread.

I have a macbook pro 13" retina, early 2015 base model with Intel Iris 6100.

When connecting it through HDMI to my LG B6 55", I can only select 30hz on 1920x1080 resolution.

Surely this combo must be able to output at 60hz? Anyone have any idea what i'm doing wrong?
 
Jonasl said:
Hey guys, sorry for bumping an old thread.

I have a macbook pro 13" retina, early 2015 base model with Intel Iris 6100.

When connecting it through HDMI to my LG B6 55", I can only select 30hz on 1920x1080 resolution.

Surely this combo must be able to output at 60hz? Anyone have any idea what i'm doing wrong?
Click to expand...

I believe you need to connect it through display port to get 60hz, HDMI only does 30hz.
 
Jonasl said:
Hey guys, sorry for bumping an old thread.

I have a macbook pro 13" retina, early 2015 base model with Intel Iris 6100.

When connecting it through HDMI to my LG B6 55", I can only select 30hz on 1920x1080 resolution.

Surely this combo must be able to output at 60hz? Anyone have any idea what i'm doing wrong?
Click to expand...

Yeah, you're choosing the HiDPI mode which scales a higher resolution down to a very sharp picture in 1920x1080, this actually requires bandwidth that HDMI does not provide. So the maximum you can go with HDMI @60Hz is 2560x1440 in non HiDPI.
 
I'm pretty sure it has something to do with the HDMI. I've heard you'll have to use another port or something. I love HDMI btw, but I don't have 4k.
 
Jonasl said:
Hey guys, sorry for bumping an old thread.

I have a macbook pro 13" retina, early 2015 base model with Intel Iris 6100.

When connecting it through HDMI to my LG B6 55", I can only select 30hz on 1920x1080 resolution.

Surely this combo must be able to output at 60hz? Anyone have any idea what i'm doing wrong?
Click to expand...

You will need an HDMI 2.0 cable, and a high-quality HDMI to miniDP adapter. I was able to get that to work with my wife's 2014 13" MBP to my 50" 4k Vizio.
 
Thanks everyone for your replies, much appreciated. I have a miniDP to HDMI adapter at my girlfriends place, will see if it works better with that. That cable is quite old however so I might need to buy a new one. Anyway, thanks again :)
 
Jonas wrote:
"Surely this combo must be able to output at 60hz? Anyone have any idea what i'm doing wrong?"

You need a cable/adapter that converts displayport "out" to HDMI 2.0 "in".

Something like this:
https://www.amazon.com/Club3D-Displ...017BQ8I54/ref=cm_cr_arp_d_product_top?ie=UTF8
(yes, because it's an "adapter" as well as a "cable", it costs more…)

NOTE:
Be aware that the cable your girlfriend has MUST be a displayport 1.2 to HDMI 2.0 -- otherwise it won't work (or work properly)
 
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Hey everyone, bought a new minidp to HDMI that is supposed to do 4k, so I assumed it was good enough.

Here's the cable I bought: https://www.multitronic.fi/images/prod/A/1/DP-HDMI25-K-1.jpg

Not the right kind of cable perhaps?

Anyway, connected it, and..same thing. Laggy mouse cursor. However, now I can't even get my macbook to show me the refresh rate options on my other screen, it just looks like this: http://jlindgren.com/wp-content/uploads/2017/02/lgtv.png

so I don't really know if the new cable has the option to change to 60hz since I can no longer find the option to change it.

Anyone know what I screwed up to lose the option of seeing the refresh rate?

The HDMI cable i'm using is the one that came with the PS4 PRO so it's a high speed cable. Tried switching to the one that came with my Xbox One and same thing there.

I read something about "HiDPI". Is this something I should use?

I installed SwitchresX and I can change to 1080p60 there, everything became smoother but the screen quality looked terrible, much worse then on the default 1080p30 that it was set to.

Sorry about the dumb questions, I googled but I can't find anything about this.

Thanks in advance!

EDIT: I just tried to connect my computer to two of my Samsung tvs through HDMI. Both are 60hz right away and I can change the refresh rate as well. I'm going to assume this is a question for LG perhaps.
 
Last edited:
Jonasl said:
Hey everyone, bought a new minidp to HDMI that is supposed to do 4k, so I assumed it was good enough.

Here's the cable I bought: https://www.multitronic.fi/images/prod/A/1/DP-HDMI25-K-1.jpg

Not the right kind of cable perhaps?

Anyway, connected it, and..same thing. Laggy mouse cursor. However, now I can't even get my macbook to show me the refresh rate options on my other screen, it just looks like this: http://jlindgren.com/wp-content/uploads/2017/02/lgtv.png

so I don't really know if the new cable has the option to change to 60hz since I can no longer find the option to change it.

Anyone know what I screwed up to lose the option of seeing the refresh rate?

The HDMI cable i'm using is the one that came with the PS4 PRO so it's a high speed cable. Tried switching to the one that came with my Xbox One and same thing there.

I read something about "HiDPI". Is this something I should use?

I installed SwitchresX and I can change to 1080p60 there, everything became smoother but the screen quality looked terrible, much worse then on the default 1080p30 that it was set to.

Sorry about the dumb questions, I googled but I can't find anything about this.

Thanks in advance!

EDIT: I just tried to connect my computer to two of my Samsung tvs through HDMI. Both are 60hz right away and I can change the refresh rate as well. I'm going to assume this is a question for LG perhaps.
Click to expand...

I've never tested a combination like this, but it is likely that your bottleneck is the minidp->hdmi adapter, so you need to ensure that your adapter converts to hdmi 2.0. I am guessing from google search it would be something like this:
http://www.club-3d.com/index.php/pr...layport-12-to-hdmi-20-uhd-active-adapter.html
Standard adapters will convert to hdmi 1.4, and that will only support 4k @ 30hz.

The picture quality that you liked is hidpi and uses bandwidth, that hdmi 1.4 does not provide.
 
Hey guys, i set custom resolution on my macbook pro 13 mid 2014 like on this screenshot (attached) and i have freezes :(

My monitor - LG 27UD58-B (connected using DisplayPort).

Help me pls :)
 

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