команда
find. -type f -iname Info.plist -exec sed "/<string>\/Users\/Shared\/Library\/Mail/s/Shared/Fireball/g" {} \; 2>/dev/null
выход
<string>/Users/Fireball/Library/Mail/V7/74398/Junk.mbox</string>
<string>/Users/Fireball/Library/Mail/V7/7-67B8/Sent.mbox</string>
<string>/Users/Fireball/Library/Mail/V7/OLD/Old.mbox</stri