Shock
grabcad
Users of British 3-pin plugs (BS 1363) on a Macbook (any model) often report that the device's power adapter is poorly designed, leading to periodic electric shocks due to lack of grounding. To address this issue, I came up with an improved design and even created a proof of concept. However, my project didn't progress further as I don't have access to a 3D printer and potential backers worry about Chinese copycats. Nonetheless, I haven't infringed on Apple's intellectual property by modifying only the plug (BS 1363), which they cannot patent or copyright.
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