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Function keys not working Mac Air

I have only recently upgraded to Mac os Sierra, and since then ALL function keys have stopped working. The only one which does work is F11, which for some reason is focusing on dock, not changing the volume. I have tried various settings techniques i have seen online, but nothing is working. Holding fn down doesn't work either. HELP!!



最後更新:2017-10-07 05:33:12

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