Swap alt and cmd on macOS via Terminal

macosAltCmdSwap.sh

# Reference
# https://developer.apple.com/library/archive/technotes/tn2450/_index.html
#
# How to swap wordwise shortcuts to align with Windows/Linux
# http://benogle.com/2010/01/18/windowslinux-developers-remap-your-mac.html
# https://theconfused.me/blog/switching-between-mac-and-linux-keyboards/
#
# Swap cmd & alt to Windows/Linux style
# left cmd = e3
# left alt = e2
# right cmd = e7
# right alt = e6
#
hidutil property --set '{"UserKeyMapping":
    [{"HIDKeyboardModifierMappingSrc":0x7000000e7,
      "HIDKeyboardModifierMappingDst":0x7000000e6},
     {"HIDKeyboardModifierMappingSrc":0x7000000e6,
      "HIDKeyboardModifierMappingDst":0x7000000e7},
      {"HIDKeyboardModifierMappingSrc":0x7000000e3,
      "HIDKeyboardModifierMappingDst":0x7000000e2},
     {"HIDKeyboardModifierMappingSrc":0x7000000e2,
      "HIDKeyboardModifierMappingDst":0x7000000e3}]
}'

# Reset Keymap
hidutil property --set '{"UserKeyMapping":[]}'