A flashing question mark appears when you start your Mac


 
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Operating Systems OS X (Apple) OS X Support RSS A flashing question mark appears when you start your Mac
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Old 11-07-2008
A flashing question mark appears when you start your Mac

If you see a flashing question mark when you start your Mac, it's probably because it can't find the system software it needs to start up. Usually, all you have to do to get your Mac back up and running is remind it where its software is. After the flashing question mark appears, one of two things may happen: The computer starts up normally after a brief delay. The computer does not start up.

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pcastctl(8)						    BSD System Manager's Manual 					       pcastctl(8)

NAME
pcastctl -- Podcast Producer daemons control interface SYNOPSIS
pcastctl status target on|off|start|stop|restart OPTIONS
The available options are as follows: status print status of running daemons target affect agent or server daemon start|stop|restart explicitly start/stop/restart daemon. Note that 'restart' will kill all instances of a given daemon, as will 'stop' if none is specified in the pid file. RETURN VALUES
0 Completed succesfully. 1 Action failed 10 Not run as root. 50 Target not recognized: use 'a', or 's'. 51 Action not recognized: use start|stop|restart 52 Executables not found; may need to reinstall Podcast Producer. 53 Process directory not found; may need to reinstall Mac OS X. 54 Timeout waiting for action to complete. 55 Launchd manipulation failure. FILES
/usr/libexec/podcastproducer/pcastagentd Podcast Producer agent daemon /usr/share/podcastproducer/pcastserverd Podcast Producer server daemon /var/run/pcastagentd.pid Podcast Producer agent process ID /var/run/pcastserverd.pid Podcast Producer server process ID /System/Library/LaunchDaemons/com.apple.pcastagentd.plist Launchd agent daemon control file /System/Library/LaunchDaemons/com.apple.pcastserverd.plist Launchd server daemon control file EXAMPLES
status of Podcast Producer agent daemon $ pcastctl agent status edit launchd configuration to launch server on system startup $ pcastctl server on DIAGNOSTICS
Warning: Warning: ## copies of (pcastagentd|pcastserverd) already running Trying to launch another daemon when one or more already running; will usually succeed, but may cause unpredictable behavior. See also RETURN VALUES, above. ERRORS
Error: failed to launch (executable) Tried to start/restart a give daemon, but failed. Error: process 'executable' not currently running Tried to kill a process which did not exist. SEE ALSO
pcast(1) launchd(8) HISTORY
This program was first introduced in Mac OS X 10.5 "Leopard". It was inspired by xgridctl(8). BUGS
pcastctl(8) uses kill -TERM to allow the daemons a chance to die gracefully; there is currently no way to force a kill -KILL. Bug reports can be sent to bugreport.apple.com Feedback can be sent to podcastproducer@apple.com Mac OS September 29, 2004 Mac OS