Resposta para "Electricity passes throug the MacBook to me"Essentially ALL laptops I owned that had metallic bodies exposed shocked me when using non-grounded connections (macbook air 2012, sony vaio sz-110, toshiba, others I do not remember). It is NOT an issue of reversed polarity of the connection (the laptop's power adapters are not polarized so I can invert the connection and still get shocked). This appears to be a serious design flaw in the usual switching adapter of the laptops and I am surprised it is there and not fixed. How I fixed it for my laptops: 1) For the MBA I now use the corded connector rather than the compact one. The former is grounded the latter is not. 2) For other machines that do not have a grounded connector I have a single banana-alligator cable that goes to the ground hole in the outlet and the alligator grabs onto the ground shield of an unused USB connector. Problem solved, but very inelegant.