[trarmp]

Oh, I finally have something of value to add to a HN thread!

I was always bothered by this and managed to fix it a few months ago. I had grounded my power-plug-box to the central heating system with some copper (don’t ask), but was wondering why I still got those vibrations whenever I was charging the MacBook.

Turns out, charging through just the monitor (via Thunderbolt) solved this: the monitor was grounded. The default MacBook charger (EU) plug just has just two prongs; a third one for grounding exists, but has to be attached separately.

Edit: indeed, this was on a 14” 2021 MBP. They definitely still get the vibrations when connected to a power source without grounding.