Q: How do I connect my new Macbook (12") to a 4k monitor and get a 60Hz refresh rate

Well buy it then, cross your fingers, best of luck. Just stop whining about it.

Who's whining? And why is this such a problem for you?

Pro tip: This is a discussion forum.

Pro Tip: Start your own discussions instead of highjacking someone else's posting.

What are you talking about? I offered the original poster numerous solutions to their question. You offered none.

Look again, you supplied only one response to the OP, and it wasn't a solution, it was two questions.

Can someone tell me what 30Hz means is real world use? I have no intention of gaming or watching anything beyond the occasional YouTube. Am I going to notice this?

Dear original poster, and anyone else that has or is interested in a MacBook (which clearly Lanny does not and is not), as mentioned above, there appear to be at least 3 options (2 as of yet unreleased) that proclaim to enable 4K @60Hz:

CalDigit USB-C Dock (see the table at the bottom): http://www.caldigit.com/USB-C/

Google's USB-C to Display Port adapter: http://www.macworld.com/article/2914011/usb-c-adapters-and-cables-the-first-batc h.html

https://store.google.com/product/usb_type_c_to_displayport_cable

Hydradock USB-C 11 port dock: https://www.kickstarter.com/projects/kickshark/hydradock-11-port-usb-c-dock-for- apple-macbook/posts/1414138?lang=de

However, if you ever forget what the specifications are for Apple's USB-C Digital AV Multipart adapter, just shout out, and I'm sure Lanny will re-quote them for you, or chastise you for wanting to use a "pro" monitor with a non-"pro" machine.

I'll post back with any further info and results I find.

And, you're still replying to me instaed of the OP. My mistake was to reply to your questions.

Another Pro Tip for you: Learn how to use the correct Reply links.

Thank you for your contribution!

intel does indeed state 4K @60hz is possible with the M5 and M7 over a variety of interfaces se the intel M7 specifications "link to intel"

4K Support Yes, at 60Hz

Max Resolution (Intel® WiDi)‡ 1080p

Max Resolution (HDMI 1.4)‡ 4096@2304@24Hz

Max Resolution (DP)‡ 3840x2160@60Hz

Max Resolution (eDP - Integrated Flat Panel)‡ 3840x2160@60Hz

SwitchResX http://www.madrau.com/srx_howtouseit/srx_howtouseit/srx_your_mac.html

looks very interesting and perhaps allows for an override - it would be indeed be cool if someone tested if it could force 4K @60hz and then monitored the rMB for a couple of days.. keep a fire extinguisher close by just in case. 

How-To: Drive a 4K display at 60 Hz with the 2016 MacBook:

http://9to5mac.com/2016/06/04/how-to-enable-4k-60hz-resolution-2016-macbook/