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https://kansir.com/2014/11/08/canon-scanner-%e4%b8%8d%e8%83%bd%e7%9b%b4%e6%8e%a5%e5%9c%a8-yosemite-%e4%b8%8a%e4%bd%bf%e7%94%a8/
Canon Scanner 不能直接在 Yosemite 上使用