[tabs_masterrace]

I think you need a relatively new GPU. Some older models (older then 2015-2016) don't offer scaled resolutions yet, but you can still go for non-scaled 1440p. It is not as sharp on a native 4k display, but still way more readable.

Also always connect via DisplayPort instead of HDMI if you can, safes a ton of trouble.

[Nursie]

I have a Macboom pro retina 2013. Scaling works just fine on my 32" 4K screen...

[s3nnyy]

i use a macbookpro 2015 mid year, mh, thanks