Remapping MacBook pro keys

README.md

This hidutil command remaps the following keys on the internal MacBook Pro keyboard:

1. caps lock is remapped to esc
2. right command is remapped to right option
3. right option is remapped to right ctrl

I use these remappings because I spend most of my time working in the terminal or in Emacs, so having an extra command key is less important to me than having symmetric left/right ctrl and option keys.

To use com.local.KeyRemapping.plist, place it in ~/Library/LaunchAgents/

com.local.KeyRemapping.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Label</key>
    <string>com.local.KeyRemapping</string>
    <key>ProgramArguments</key>
    <array>
        <string>/usr/bin/hidutil</string>
        <string>property</string>
        <string>--matching</string>
        <string>
            {
              "ProductID":0x342,
              "VendorID":0x5ac
            }
        </string>
        <string>--set</string>
        <string>{"UserKeyMapping":[
            {
              "HIDKeyboardModifierMappingSrc": 0x7000000E6,
              "HIDKeyboardModifierMappingDst": 0x7000000E4
            },
            {
              "HIDKeyboardModifierMappingSrc": 0x7000000E7,
              "HIDKeyboardModifierMappingDst": 0x7000000E6
            },
            {
              "HIDKeyboardModifierMappingSrc": 0x700000039,
              "HIDKeyboardModifierMappingDst": 0x700000029
            }
        ]}</string>
    </array>
    <key>RunAtLoad</key>
    <true/>
</dict>
</plist>