Remap Tilda and Paragraph buttons on a macbook keyboard https://apple.stackexchange.com/a/374074/351784

replace-paragraph-and-tilda.sh

#!/bin/sh

# Replaces tilda with left shift (literally making left shift button "longer")
# Replaces paragraph with tilda (so your tilda is in top left corner under escape now)
hidutil property --set '{"UserKeyMapping":[
{"HIDKeyboardModifierMappingSrc":0x700000035,"HIDKeyboardModifierMappingDst":0x7000000E1},
{"HIDKeyboardModifierMappingSrc":0x700000064,"HIDKeyboardModifierMappingDst":0x700000035}
]}'

reset-remappings.sh

#!/bin/sh

# Removes any remappings and resets back to initial state just by passing an empty array
hidutil property --set '{"UserKeyMapping":[]}'

swap-tilda-and-paragraph.sh

#!/bin/sh

# Swaps paragraph and tilda (so your tilda is in top left corner under escape now and paragraph is on the left from z)
hidutil property --set '{"UserKeyMapping":[
{"HIDKeyboardModifierMappingSrc":0x700000035,"HIDKeyboardModifierMappingDst":0x700000064},
{"HIDKeyboardModifierMappingSrc":0x700000064,"HIDKeyboardModifierMappingDst":0x700000035}
]}'