I have this app/process named BlueTool. What is it? This is part of my crash system log deny mach-lookup com.apple.system.notification_center Process: BlueTool  Path: /usr/sbin/BlueTool Load Address: 0xfb000 Identifier: BlueTool Version: ??? (???) Code Type: arm (Native) Parent Process: launchd  It is also under Library /Application Support. And what is this -> FacebookAccountMigrationDialog.app Is it by default?