https://purengom.com/2011/10/29/%eb%a7%a5%eb%b6%81-%ed%94%84%eb%a1%9cmacbook-pro-mid-2010-%ea%b2%80%ec%a0%95-%ed%99%94%eb%a9%b4-%eb%b9%84%eb%94%94%ec%98%a4-%ec%97%85%eb%8d%b0%ec%9d%b4%ed%8a%b8/