March 21, 2013, 4:15 PM — Here's how you can remove all apps from Launchpad in OS X on your Mac. You should be aware that you cannot undo this, so think carefully before doing it.
1. Open a terminal window.
2. Type in the following commands, then hit Enter after each.
sqlite3 ~/Library/Application\ Support/Dock/*.db "DELETE from apps;"
sqlite3 ~/Library/Application\ Support/Dock/*.db "DELETE from groups WHERE title<>'';"
sqlite3 ~/Library/Application\ Support/Dock/*.db "DELETE from items WHERE rowid>2;"
killall Dock
For more, see the original article at the link below.
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