# Print any keyequivalent definitions
PlistBuddy -c "print NSUserKeyEquivalents" ~/Library/Preferences/com.bohemiancoding.sketch3.plist
# Set keyequivalent of 'Open…' as '^⌘O'
PlistBuddy -c "set NSUserKeyEquivalents:'Open…' '@^o'" ~/Library/Preferences/com.bohemiancoding.sketch3.plist