My personal key remappings for macos - for "ISO International Layout" keyboards

set-user-key-mapping.sh

#!/bin/bash

common_mapping=(
        $'    {"HIDKeyboardModifierMappingSrc":0x7000000e7,    \n' # <!-- from: right command -->
        $'     "HIDKeyboardModifierMappingDst":0x7000000e6},   \n' # <!--   to: right option -->
        $'                                                     \n' #
        $'    {"HIDKeyboardModifierMappingSrc":0x7000000e6,    \n' # <!-- from: right option -->
        $'     "HIDKeyboardModifierMappingDst":0x7000000e7},   \n' # <!--   to: right command -->
        $'                                                     \n' #
        $'    {"HIDKeyboardModifierMappingSrc": 0x7000000E0,   \n' # <!-- from: left control -->
        $'     "HIDKeyboardModifierMappingDst": 0xFF00000003}, \n' # <!--   to: fn -->
        $'                                                     \n' #
        $'    {"HIDKeyboardModifierMappingSrc": 0x700000039,   \n' # <!-- from: caps lock -->
        $'     "HIDKeyboardModifierMappingDst": 0x7000000E0}   \n' # <!--   to: left control -->
)

mapping_with_grave_lines=(
	$'{"UserKeyMapping": [                                 \n'
        $'    {"HIDKeyboardModifierMappingSrc":0x700000064,    \n' # <!-- from: paragraph and plusminus -->
        $'     "HIDKeyboardModifierMappingDst":0x700000035},   \n' # <!--   to: grave accent and tilde -->
        $'                                                     \n' #
        $'    {"HIDKeyboardModifierMappingSrc":0x700000035,    \n' # <!-- from: grave accent and tilde -->
        $'     "HIDKeyboardModifierMappingDst":0x700000064},   \n' # <!--   to: paragraph and plusminus -->
        $'                                                     \n' #
	"${common_mapping[@]}"
        $' ]}                                                  \n'
)

# for use with an external logitech bluetooth keyboard with a mac layout: for some reason it already swaps the ` and § keys
# even though the keys printed on the keyboard match the apple layout
mapping_without_grave_lines=(
	$'{"UserKeyMapping": [ \n'
	"${common_mapping[@]}"
        $' ]}                  \n'
)


mapping_with_grave="${mapping_with_grave_lines[*]}"
mapping_without_grave="${mapping_without_grave_lines[*]}"

# external bluetooth keyboard data:
# from `system_profiler -detailLevel full`
#          MX Keys M Mac:
#              Address: DC:63:F4:B1:41:7A
#              Vendor ID: 0x046D
#              Product ID: 0xB36A
#              Firmware Version: RBK74.00_0004
#              Minor Type: Keyboard
#              Services: 0x400000 < BLE >

# reset all
hidutil property --set '{"UserKeyMapping":[]}'

# remapping specific to the external keyboard (MX Keys M Mac)
#hidutil property --matching '{"ProductID":0xB36A,"VendorID":0x46D}' --set "$mapping_without_grave"

# do a general remapping instead because the keyboard disconnecting/connecting seems to break it somehow (?)
hidutil property --set "$mapping_without_grave"

# mapping for the internal keyboard (got the values from `hidutil list`)
hidutil property --matching '{"ProductID":0x281,"VendorID":0x5ac}' --set "$mapping_with_grave"