[proverbialbunny]

I have a 2015 MBP that runs 4k60 just fine, but I do admit the gpu gets nearly maxed out on the desktop running software like CLion, as the IDE is gpu accelerated. Anything pre 2015 is most likely a no go.

From a pragmatic standpoint you'll need a gpu that supports display port 1.2 or hdmi 2.0 or thunderbold / usb-c, and at least 1GB of vram as many operating systems take up to roughly 900MB of vram to run a desktop at 4k. Firefox and Chrome can run fine on 100MB of vram (even Youtube at full 60fps at 100MB of vram is fine), but they really want around 500MB of vram to breath, so 2GB is a good safe minimum for having a lot of windows open at 4k.

The 2015 MBP has 2GB of vram and supports display port 1.2.