If you’ve ever felt a faint tingling or vibration on your MacBook’s palm rest while it’s plugged in, don’t worry — it’s completely normal and not a sign of a hardware issue.
🔎 The Cause
This sensation is due to the MacBook’s grounding and insulation design. Apple’s power adapters are intentionally designed without a grounded connection, but they still provide full electrical isolation between the mains power and the MacBook’s low-voltage system. As a result, you might occasionally feel a slight vibration or tingling near the trackpad when the device is plugged in.
✅ The Solution
If you find the sensation uncomfortable, using Apple’s Power Adapter Extension Cable can eliminate it. This accessory is available for purchase directly from Apple at the link provided below.
