MacBook Pro 13’’ 2019 and external display 4K/1080p@60Hz (Solved)

emikaadeo

macrumors newbie
Original poster
Aug 27, 2019
15
1
Hi.
I’ve got a MacBook Pro 13’’ 2019 256GB (2 x TB3)
My external display is SAMSUNG TV 43’’ 2017 UHD (3840x2160)
My MacBook is connected to TV by this HDMI 2.0 cable and this adapter.
The problem is I cant’t display 1080p@60Hz on my SAMSUNG TV
If I go to System preferences->Monitors and click on “Scaled” and select “Looks like 1920 x 1080” I only get 30Hz.
If I click with “Option” key on “Scaled” and check “Show low resolutions” there is 1920 x 1080 but I can only select refresh at 24Hz, 25Hz and 30Hz
Do you guys got any ideas what’s wrong?

I’ve already tried SwitchResX and I can switch to 1080p@60Hz but without scaling.
 

jav6454

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Nov 14, 2007
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That multiport is only states it handles HDMI and 4k, but it does not mention what HDMI version it handles. In order to output 4k @ 50 or 60 fps (Hz), you need at minimum an End-to-End HDMI 2.0 connectivity setup. If that multiport is not HDMI 2.0, then you will not have enough bandwidth to go 60Hz.

I assume the multiport you have is only HDMI v1.4 which can output 4k signal, but only up to 24 Hz.

COMPATIBLE DEVICES

2018 iPad Pro, 2018 MacBook Air, 2017 iMac, iMac Pro, 2016/2017 MacBook Pro 13" and 15" models, 2015/2016/2017 MacBook 12".
Not compatible with Apple SuperDrive.
HDMI port requires a direct HDMI to HDMI connection.
I highlighted some important things. The multiport does not state it is intended for 2019 MBPs.
 

emikaadeo

macrumors newbie
Original poster
Aug 27, 2019
15
1
That multiport is only states it handles HDMI and 4k, but it does not mention what HDMI version it handles. In order to output 4k @ 50 or 60 fps (Hz), you need at minimum an End-to-End HDMI 2.0 connectivity setup. If that multiport is not HDMI 2.0, then you will not have enough bandwidth to go 60Hz.

I assume the multiport you have is only HDMI v1.4 which can output 4k signal, but only up to 24 Hz.



I highlighted some important things. The multiport does not state it is intended for 2019 MBPs.
Hi.
4K@60Hz is not the case with this multiport. I'm talking about 1080p@60Hz.
Even if it's HDMI 1.4 it should handle 1080p@60Hz, right?
 

jav6454

macrumors P6
Nov 14, 2007
16,864
1,480
1 Geostationary Tower Plaza
Hi.
4K@60Hz is not the case with this multiport. I'm talking about 1080p@60Hz.
Even if it's HDMI 1.4 it should handle 1080p@60Hz, right?
In your case, because your TV is 4k, it outputs a 4k signal even if you "scale" it. Scaling has to do with resolution emulation in a sense. However, the true signal output is 4k.

For example, like how all retina Macs have 2880-by-1800 native resolution but in reality the software scales it to half of that in order to achieve the retina effect; however, it's still the same resolution being processed. Same deal here. You output 4k and then scale it to 2k, but it is a 4k signal nonetheless.
 
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emikaadeo

macrumors newbie
Original poster
Aug 27, 2019
15
1
In your case, because your TV is 4k, it outputs a 4k signal even if you "scale" it. Scaling has to do with resolution emulation in a sense. However, the true signal output is 4k.

For example, like how all retina Macs have 2880-by-1800 native resolution but in reality the software scales it to half of that in order to achieve the retina effect; however, it's still the same resolution being processed. Same deal here. You output 4k and then scale it to 2k, but it is a 4k signal nonetheless.
So it's impossible to achieve 1080p@60Hz ?
What about this new APPLE multiport?
1080p at 60Hz or UHD (3840 by 2160) at 30Hz on:
MacBook Pro (13-inch, 2016 and later)
 

jav6454

macrumors P6
Nov 14, 2007
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So it's impossible to achieve 1080p@60Hz ?
What about this new APPLE multiport?
1080p at 60Hz or UHD (3840 by 2160) at 30Hz on:
MacBook Pro (13-inch, 2016 and later)
It’ll work because of the following:

3840x2160 at 60Hz on:
iPad Pro 11-inch, iPad Pro 12.9-inch (3rd Generation), MacBook Pro (15-inch, 2017 and later), iMac (Retina 5K, 27-inch, 2017 and later), iMac (Retina 4K, 21.5-inch, 2017 and later), and iMac Pro (2018)
That means that your 4K TV will get a 60Hz signal because the adapter is pushing out at HDMI 2.0 speeds.

Remember, even if the signal is scaled to something less, the true signal is still 4K.
 

emikaadeo

macrumors newbie
Original poster
Aug 27, 2019
15
1
It’ll work because of the following:



That means that your 4K TV will get a 60Hz signal because the adapter is pushing out at HDMI 2.0 speeds.

Remember, even if the signal is scaled to something less, the true signal is still 4K.
Correct me if I'm wrong. With APPLE adapter and my MBP 13'' I can scale 4K to 1080p and get a 60Hz refresh, right?
Does this mean that I can also achieve 4K@60Hz on my 4K TV?
 

jav6454

macrumors P6
Nov 14, 2007
16,864
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Correct me if I'm wrong. With APPLE adapter and my MBP 13'' I can scale 4K to 1080p and get a 60Hz refresh, right?
Does this mean that I can also achieve 4K@60Hz on my 4K TV?
Yes, the new MacBook Pros can output 4K @ 60 Hz

Just check Apple’s tech specs for the laptop in their home page. That adapter just allows the faster HDMI 2.0 signal to go thru.
 

emikaadeo

macrumors newbie
Original poster
Aug 27, 2019
15
1
Yes, the new MacBook Pros can output 4K @ 60 Hz

Just check Apple’s tech specs for the laptop in their home page. That adapter just allows the faster HDMI 2.0 signal to go thru.
Ok, so there's one thing I don't understand.
Why with MacBook Pro 13'' APPLE states (highlighted)
1080p at 60Hz or UHD (3840 by 2160) at 30Hz on:
MacBook Pro (13-inch, 2016 and later)
 

emikaadeo

macrumors newbie
Original poster
Aug 27, 2019
15
1
For some reason, Apple's adapter will only offer 4k @ 30Hz from a 13" MacBook Pro.
Yeah, that's what I think and that's what APPLE states:
1080p at 60Hz or UHD (3840 by 2160) at 30Hz on:
MacBook Pro (13-inch, 2016 and later)
I use this adapter to get 4k/60Hz from my 2018" 13" MacBook Pro: https://www.anker.com/products/variant/usbc-to-hdmi-adapter/A8306041
Thanks for the link but I can't find information if it's compatible with MBP 13'' 2019.
Does anyone tested it?
 

chrfr

macrumors G3
Jul 11, 2009
8,192
2,522
Yeah, that's what I think and that's what APPLE states:


Thanks for the link but I can't find information if it's compatible with MBP 13'' 2019.
Does anyone tested it?
The 2018 and 2019 models are exactly the same except that the CPU in the 2019 is 0.1GHz faster. The adapter will work fine with the 2019.
 

emikaadeo

macrumors newbie
Original poster
Aug 27, 2019
15
1
The 2018 and 2019 models are exactly the same except that the CPU in the 2019 is 0.1GHz faster. The adapter will work fine with the 2019.
Are you sure? Look at my first post.
I'm talking about 2019 13'' entry-model with 1.4GHz CPU and two Thunderbolt 3 ports, not the one with 2.4GHz CPU and four Thunderbolt 3 ports.
 

chrfr

macrumors G3
Jul 11, 2009
8,192
2,522
Are you sure? Look at my first post.
I'm talking about 2019 13'' entry-model with 1.4GHz CPU and two Thunderbolt 3 ports, not the one with 2.4GHz CPU and four Thunderbolt 3 ports.
Both will work, in any case. I've got users with a variety of computers using 4k/60Hz through the Anker adapter.
 

Fishrrman

macrumors P6
Feb 20, 2009
17,189
5,540
This sounds like "a connecting cable issue".
Hopefully it will be resolved with the new adapter.

However... if that doesn't fix it...
Consider getting a "high speed" HDMI 2.0 cable to run from the adapter to the tv.

Not all HDMI cables are the same!
 

jav6454

macrumors P6
Nov 14, 2007
16,864
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Are you sure? Look at my first post.
I'm talking about 2019 13'' entry-model with 1.4GHz CPU and two Thunderbolt 3 ports, not the one with 2.4GHz CPU and four Thunderbolt 3 ports.
From Apple's Tech Specs:

Video Support
Simultaneously supports full native resolution on the built-in display at millions of colors and:
  • One display with 5120-by-2880 resolution at 60Hz at over a billion colors
  • Up to two displays with 4096-by-2304 resolution at 60Hz at millions of colors
  • Up to two displays with 3840-by-2160 resolution at 60Hz at over a billion colors
Thunderbolt 3 digital video output
  • Native DisplayPort output over USB‑C
  • VGA, HDMI, DVI, and Thunderbolt 2 output supported using adapters (sold separately)
So yes, it'll work.