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Web Information: 2017-Oct-06 - macOS High Sierra users: Apple released important [security patches](https://support.apple.com/en-us/HT208165), so updating is recommended. - macOS High Sierra ユーザ達: Appleが大事な [セキュリティパッチ](https://support.apple.com/en-us/HT208165)をリリースしたので、更新をおすすめします。

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