### Apple keyboard Fn
Not supported.
-Apple keyboard sends keycod for Fn unlike most of other keyboards.
-I think you can send Apple Fn key using Appleventer Page 0xff00 and usage 0x0003. You have to change HID Report Descriptor, of course.
+Apple keyboard sends keycode for Fn unlike most of other keyboards.
+I think you can send Apple Fn key using Apple venter specific Page 0xff00 and usage 0x0003. But you have to change HID Report Descriptor for this, of course.
https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/AppleHIDUsageTables.h
https://github.com/tmk/tmk_keyboard/blob/5a8dbc63ea29eb454ad5f36de5c6c33172230f88/common/keycode.h#L141-L144
+
## Keys supported in Mac OSX?
You can know which keycodes are supported in OSX from this source code.