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MacBook Air Track Pad

Hi guys! I just got this MacBook about 6 months ago and I am noticing this on my trackpad. At first I thought it was oil on my MacBook, but even after trying to clean it with alcohol it still stays. I am now just realizing it is inside the track pad, although I have no idea what is it. Is it something to be worried about? Or can I just let it be?

I think it's not critical issue, though you'd better make Genius Bar appointment to show them it.

最后更新：2017-08-21 21:43:28

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