4k @ 60hz with MacBook (Retina, 12-inch, Early 2015) ?

Hi Lanny

Thanks for helping, do you know if the Macbook 12inch (2015) will drive a ultrawide monitor with 3440 x 1440 pixels at 60Hz such as the Samsung S34E790C 34-Inch Curved LED Monitor for example? This appears to be somewhere in between the 2k supported at 60Hz and the 4K at 30Hz.

Many thanks

I'm having trouble understanding the issues other folks are having. I'm using the Apple USB C AV adapter and connecting to my Dell 2514q @ 30Hz via HDMI and it seems to work without issue. I don't experience any mouse lag or delay in dragging windows. The Dell 2514q seems to respond as well as my native laptop display, as far as I know.

I've had one or two videos that played a little choppy, but Netflix runs without issue. And sometimes it takes a few extra clicks on the keyboard to get the monitor/Macbook to come out of sleep.

These are minor irritations, though, in order to getting to what amounts to a 24" retina screen. I knew the MacBook 12 was going to involve compromises in the performance area when I purchased it, so no gripes there.

Of course, I've never seen an external display running at @60Hz. Maybe I don't know what I'm missing.

Has anybody with the issues with DisplayPort connections simply tried connecting with the HDMI adapter instead?

-ken

I am using a 2015 MacBook 12-inch (1.2Ghz version), with Apple Digital AV adapter (USB-C -> HDMI), and an UltraHD/4K display (Asus PB287Q), both in 3840x2160 @ 30Hz (native resolution when working close to it, for web dev), and 1920x1080 retina @ 30Hz (for photo editing in LR5).

It works perfectly in both case, the retina mode 1920x1080 is a pleasure to use to surf the web, and I am using this setup right now to write this answer.

Notice that I found out that my 2011 MacBook Pro 17-inch (Radeon HD 6750M) also handle the native resolution (3840x2160 @ 30Hz) gracefully, not offering the retina option, with an active mini-DisplayPort -> HDMI adapter.

Another point is that you may not need 60Hz to be happy, because there are many UltraHD/4K displays that have slow to very slow LCD, thus creating artefact when moving things on screen, scrolling, etc. But at 30Hz with my MacBook 12-inch, scrollings are just perfect!

Does anyone know whether the google usb type c to displayport work well with apple type-c to vga/usb adaptor?

i have an apple to vga/usb adaptor and want to use google cable to connect dell u2715h, but still using the apple adaptor for USB upstreaming.

will it work?

Well I think they should clarify although it is Display Port 1.2 which does feature 4k at 60Hz, since they chose USB-C 3.1 gen 1 you do not get that feature. I agree all the information is in the tech specs but it requires an expert to tie it all together to understand why.

If I read everything correctly, shouldn't the 12" MacBook be able to support 1920x1080 @ 60hz? It looks like that is supported within the 5Gps speed on the previous chart (of course this is not Apple's chart). When I choose that setting it only allows 30hz, which is choppy. I can select 1080p which runs at 60hz, but then everything gets a little fuzzy around the edges on screen? One, is there really a difference between 1920x1080 and 1080P? Then, why is 30hz sharper than 60hz if they are the same or very similar resolutions?

I can confirm the 12-inch Macbook (Early-2015 model) running macOS Sierra (10.12.3) can drive the Dell P2715Q monitor at 4K (3840 x 2160) at 60Hz.

The cable I used to do this was an USB-C 3.1 to DisplayPort cable made by CHOETECH (currently $33 at Amazon).

However, I noticed the monitor was not charging the Macbook with this setup.

Question: Given that the 12-inch Macbook only has one USB-C port, how are we suppose to charge the Macbook when it's driving a monitor?

I'd say that the only posibility is to use a USB C 3.1 monitor. So through one cable you connect your monitor and it charge your computer. My guess is that DisplayPort would never charge anything.

Check this video out:

https://www.youtube.com/watch?v=YTvSY3HT3Aw

Hi,according the info as below from apple website:

and this from VESA.org

i can't tell why the retina MacBook can't output 4k 60hz...

This are the latest Apple support specifications:

https://support.apple.com/en-us/HT202856

Ciao.

As previously provided: https://support.apple.com/en-us/HT202856

It has been in Apple's tech specs from the very beginning, and still is: http://www.apple.com/macbook/specs/

So I think, in order to have a 4k@60hz on the macbook 2015 and later using DisplayPort, you need a Dock.

Check this disscusion about it:

How to connect to DisplayPort and charge?

I'm not sure if it's because of the MacBook,

It's because the MacBook is not capable of it, per its specifications. Return it for a MacBook pro.

I got exactly the same MacBook/Google type-c to displayport/p2415q,AND the same problem...

the spec of 5y51 got ability to output 4k/60hz.

so,Apple,please help us to figure it out...