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Old 09-28-2018, 09:40 AM   #1
irconde
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Question USB 4k adapter with MacBook Pro retina 2013 + Mojave only 30Hz

A couple of days ago I received my new USB-A to HDMI 1.0 Dual Monitor 4K 60 HZ.
I've tried it with my monitor (a 4K LG 27UD88-W) but I haven't been able to get 60 HZ yet (only 30Hz with 3840 x 2160 pixels) despite of having installed the last USB driver version: DisplayLink USB Graphics Software for macOS v.5.0.

The specs of my MacBook Pro are the following:
Model: MacBook Pro Retina 13" late 2013
OS version: macOS Mojave 10.14
RAM: 16 GB
Intel Iris 1536 MB graphics
USB 3.0

I'm using the adapter with a HDMI 2.0 cable.

I'd be very grateful if someone could please help me and give me some piece of advice about what I'm doing wrong or how can I fix this.

Thanks in advance.
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Old 09-28-2018, 12:14 PM   #2
rboerner
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Putting any other factors aside for the moment, the model monitor you mention having has an option setting within the on-screen display called, "HDMI ULTRA
HD Deep Color" This setting must be 'On' in order for 4K@60Hz to work via HDMI input. LG calls this out in page 23 of the manual for the display here -> https://www.lg.com/us/support-product/lg-27UD88-W
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Old 10-02-2018, 08:35 AM   #3
irconde
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First of all, thank you so much for the support and for such a quick answer. I really appreciate it.

The thing is ... following your advice I could make the screen work for 4k and 60 Hz (apparently). And I say "apparently" because on Mac OS there's a horrible lag, so It seems that the screen keeps working at 30 Hz. This is not happing on Windows 10: everything works like a charm on Windows 10. So ... I don't know ... maybe is a driver issue.

Any idea or suggestion?
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60hz, adapter, mojave, usb

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