[ggm]

Apple have form for some very odd stray vibrations around their macbook and being on charge. It's a not-electric-but-you-think-it-is thing around soft-touching their brushed aluminium case, sometimes.

The "gosh, this is hot" thing when its on charge has been an issue from time to time, as the magsafe ages out, or some component on the mac board. Apparently its caused by HF on top of the desired DC, leaking out the componentry somehow as mechanical vibration.

[gzalo]

It's just a grounding issue, just that you feel the 50/60hz and your skin detects it as a weird texture/vibration.

I think the periodic electric impulses may be interpreted by your brain as a fake stick-slip phenomenon and change how the texture feels.

See: https://superuser.com/questions/462244/electric-shock-mild-v...

[stouset]

It is electric, and it happens when you're on ungrounded AC.

[ggm]

The write ups I've read said it was a microvibration on the board, not leakage into you. Its origin is electric no matter what.

[stouset]

It’s leakage current. Again, it only happens when ungrounded.

[jve]

And happens also on multiple DELL laptops I used/touched.