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Update FAQ section on Apple Fn (#3574)

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fauxpark 2018-08-06 01:51:33 +10:00 committed by Drashna Jaelre
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docs/faq_keymap.md
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@ -87,14 +87,14 @@ On **Xorg** you can use `compose` key, instead.
And see this for **Unicode** input.
* http://en.wikipedia.org/wiki/Unicode_input
## `Fn` Key on macOS
## Apple/Mac Keyboard `Fn`
Not supported.
Unlike most Fn keys, the one on Apple keyboards actually has its own keycode... sort of. It takes the place of the sixth keycode in a basic 6KRO HID report -- so an Apple keyboard is in fact only 5KRO.
Apple/Mac keyboard sends keycode for Fn unlike most of other keyboards.
I think you can send Apple Fn key using Apple venter specific Page 0xff01 and usage 0x0003. But you have to change HID Report Descriptor for this, of course.
It is technically possible to get QMK to send this key. However, doing so requires modification of the report format to add the state of the Fn key.
Even worse, it is not recognized unless the keyboard's VID and PID match that of a real Apple keyboard. The legal issues that official QMK support for this feature may create mean it is unlikely to happen.
https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/AppleHIDUsageTables.h
See [this issue](https://github.com/qmk/qmk_firmware/issues/2179) for detailed information.
## Media Control Keys in Mac OSX