Remap caps lock to control

[pith]

~/Library/LaunchAgents/org.user.keyremap.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN"
   "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Label</key>
    <string>org.user.keyremap</string>
    <key>ProgramArguments</key>
    <array>
        <string>/usr/bin/hidutil</string>
        <string>property</string>
        <string>--set</string>
        <string>{"UserKeyMapping":[{"HIDKeyboardModifierMappingSrc":0x700000039,"HIDKeyboardModifierMappingDst":0x7000000E0}]}</string>
    </array>
    <key>RunAtLoad</key>
    <true/>
</dict>
</plist>

Then load

launchctl load ~/Library/LaunchAgents/org.user.keyremap.plist