Hacker News Reader

Interesting, early on with a 4K monitor on a Mac I was having trouble with kernel panics I wonder if this was the cause.

View on HN

It's a known issue that latest version of Mac OS has problem to connect to external 4k monitors. I did not experience kernel panics, but lagging on display, high memory and cpu usage on the windowserver daemon.

I just changed jobs and they gave me a late model MBP connected to an external 4k display. The lag is palpable, on almost any action. ALT-Tab between windows takes many hundreds of milliseconds. Typing in the terminal is so slow I often times have to go back and correct my commands because I over typed them.

I thought it was just a combination of low-end MBP (cheapest 13" available) and crappy 4K monitor (Sceptre U274K). Are you saying that there is an actual problem with macOS High Sierra that is causing my lag? I've already changed DP cables and that didn't help at all. :(

Reply on news.ycombinator.com