Removing OS X Download History Revision as of Monday, 21 December 2015 at 02:30 UTC

Some
background.
Here’s how you see the files:

  sqlite3 \
  ~/Library/Preferences/com.apple.LaunchServices.QuarantineEvents* \
  'select LSQuarantineDataURLString from LSQuarantineEvent'

I have a crontab entry that removes the downloads every night.

 * 0 * * * sqlite3 ~/Library/Preferences/com.apple.LaunchServices.QuarantineEventsV* 'delete from LSQuarantineEvent'