さらにセキュリティ会社SophosのBlogでは Wi-Fi symptoms The symptoms are varied, but the most commonly reported problem is pretty much what I’ve experienced since first rebooting into OS X 10.10 and going online wirelessly. >この症状は多様ですが、もっとも多い報告としてOS X 10.10にアップグレードしWiFiを使用し始めてから発生している。 Your network works fine for a while, typically between about 30 seconds and five minutes, and then fairly abruptly begins to suff