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Yes, it does. The mic is detachable so you can take the mic off.
There is a microphone switch on the in-line controller. When the mic is on, the indicator light is on.
Yes, it does. This gaming headset is compatible with Mac devices; but 7.1 surround sound software is not applicable on Mac devices, it is only applicable on Windows 7/8/10 devices.
No, it won't work with Xbox devices.