This is normal. All my Mac's are like that (both MagSafe and MagSafe 2). The magnet "snaps" into place causing the marks, but it doesn't affect charging so it's okay. 😉
See inside the port around the actual 5 pins of the connections, there are marks / or stains around the edge. Like if the actual magsafe connector have been grinding on the aluminium surface.
This happens pretty much straight away and can't easily be avoided, especially with the more powerful MagSafe 2 connector. It only gets worse, so just forget about it 🙂
See inside the port around the actual 5 pins of the connections, there are marks / or stains around the edge. Like if the actual magsafe connector have been grinding on the aluminium surface.