Forced quit not working as setup application cancels shut down

I upgraded to OS X and setup froze when I was setting up cloud storage. When I try to force quit, the setup application automatically cancels shut down. Tried Command q to try to quit setup, but no success. Waiting for battery to die, but is there another way? Help!

Finally was able to bring up the task minder and force quit. Command-option-escape or some variation of escape-control-command-option.

Similar Messages

Force quit not working on frozen applications in Lion

Since I updated to Lion on my 2011 Macbook pro I have applications tend to freeze up and force quit does not always work. Any Suggestions?

Yeah, have a look at your activity monitor to see what's hogging your CPU.
Shortcut to force quit is Command + Option + Esc.
Update all your apps / extensions to Lion compatible versions.
Especially Parallels / MacFuse / NTFS Drivers etc

SMBup quit. "An exception of class JSONException was not handled. The application must shut down. Exception Message: Parse Error: Expecting "{" or "[" at position 1. Exception Error Number: 1

After updating to Mavericks 10.9.2, our Canon printer would no longer scan & send to our iMacs & MacBook Pros. We downloaded & installed SMBUp. Still trying to get it to work with MacBookPros, but has been working with iMacs. Today, out of the blue, I got the following error message:
An exception of class JSONException was not handled. The application must shut down.
Exception Message: Parse Error: Expecting "{" or "[" at position 1
Exception Error Number : 1
Now I get that message every time I try to open SMBUp. Tried to download & reinstall application, but get this message on website:
Hmm, eduo.info isn't loading right now.
The servers that run eduo.info are having some trouble. This is usually just a tempoary problem, so you might want to try again in a few minutes.
(Have gotten that message for the last hour).
Help?

Hi,
Pls don't forget to reward points and close the question if you find the answers useful.
Eddy

Force Quit not working in 10.4.4

Since upgrading to 10.4.4 last week I have had problems with applications hanging (a few times a day). When this happens force quit never works. I can still go to other applications and save and quit, but I have to use the reset button to get out of the hung application. This problem just started with 10.4.4, and the frequency of applications hanging has increased dramatically.
Unfortunately, I did not back up 10.4.3, and I do not know how to get back to it.
suggestions?

More than likely after all the forced quits you have done and the forced shutdowns and restarts you have a damaged disk directory. I would start by booting of your 10.4 CD and running disk Utility and see what it finds. IN fact you may want to do all three of the steps listed here:
http://www.thexlab.com/faqs/repairprocess.html
Have you checked to make sure that you are running the latest compatible version of the applications in question?
Force quit sometimes can take a while to work. I have waited for apps for as long as 3-4 minutes before they finally quit. That is a rare event but it has happened. Microsoft Word and Safari are by far the slowest apps to force quit in my experience.
You really should not, but on rare occasions, ever have to force quit an application. IF you are doing it as often as you are chances are that something else is going on to cause it.

Force Quit not working

Some times when an application stops responding force quitting it doesn't work - the windows of that application disappear, but it still appears in the dock with the arrow of a running app under it, and next time I open the force quit window it appears again in the list.
Also tried killing the process in activity monitor and from the terminal, to no avail.
Furthermore a restart doesn't work: it hangs as it tries to shut down and the only course of action is to do a 'hard shut down', holding the power button in until it turns off.
Most often happens with iTunes, but also has happened to DVD Player, Mail, EyeTV and possibly more.
iTunes does it fairly regularly, others have only done it once or twice. Get the spinning beach ball, often when resuming play after a period of inactivity, and the program remains unresponsive. Has been happening for a while now, despite a couple of updates to iTunes.
Anyone got an idea what's wrong and/or how to fix it? It's most un-Mac like...

This behavior is typically indicative of system corruption. I would consider doing the following:
How to Perform an Archive and Install
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.

Force Quit not working & System will not go to sleep

Under the Apple Tab, system will not go into sleep when clicked.
Also, Mail, Safari and other programs are freezing up and Force Quit will not function.
Message was edited by: Max with a Mac

This is for a Mac that won't sleep.
First, read things in Apple doc.#25801 on sleep settings.
Here is Apple doc.#303698 with their tips.
Mine follow;
USB devices and hubs often cause Macs to not sleep or wake quickly from sleep (notably HP printers and scanners, HP all in ones, and Cannon scanners). Disconnect all USB except for keyboard and mouse and try. If it sleeps, add one back at a time testing after each one to find the culprit.
If you've set your Mac to receive faxes, it may not be able to sleep. It might also have a damaged preferences file.
If you use your Mac for faxing, open System Preferences. click Print & Fax, click the Faxing tab, and uncheck the Receive Faxes On This Computer box.
If that doesn't work or you've never faxed on your Mac, go to Finder/Hard Drive /Library/Preferences/SystemConfiguration and delete the com.apple.PowerManagement.plist and com..apple.AutoWake.plist files (if your Mac asks, type your admin. password).
If the latter file isn't present in the folder, go to user name(probably your name)/Library/Preferences, delete the com.apple.systemuiserver.plist file, and reboot your Mac.
Hope this helps!
P.S. One member here reported this (Michael Gleason);
"I have had this problem with my IMac G5. It is surprisingly irritating. LaCie's Silverkeeper backup software was the cause. By default it gave itself permission to wake up the computer to check if a backup was needed. Do you have this or a similar program installed which has scheduled activities including wake-up permissions as an option?"
Dave Hamilton provided this link, xlr8yourmac.com, to a member, which addresses failure of deep sleep with some users that updated and added new FireWire and USB cards.
tomhorvat adds this; After few days of messing around I found out that I had desktop background (wallpaper) set to change every 1 minute.
After unchecking "Change picture..." in system preferences (under Desktop/Screen saver), my powerbook went to sleep all by itself.
Cheers! DALE

I have to force quit mail every time I want to shut down my macbook

I know there are several other posts asking the same question but I've been through all of them and I can't find which is the application that is blocking my mail from closing. Here is the diagnostics test I ran.
Last login: Sun Feb 24 08:52:33 on console
panoss-macbook:~ Panos$ kextstat -kl | awk '!/com\.apple/{printf "%s %s\n", $6, $7}'
com.rim.driver.BlackBerryUSBDriverInt (0.0.74)
com.logmein.driver.LogMeInSoundDriver (1.0.0)
com.serato.usb.kext (2.3.0)
org.virtualbox.kext.VBoxDrv (4.2.6)
org.virtualbox.kext.VBoxUSB (4.2.6)
org.virtualbox.kext.VBoxNetFlt (4.2.6)
org.virtualbox.kext.VBoxNetAdp (4.2.6)
com.rane.driver.sl2.10.6 (1.0.1f3)
com.github.osxfuse.filesystems.osxfusefs (2.5.4)
panoss-macbook:~ Panos$ sudo launchctl list | sed 1d | awk '!/0x|com\.(apple|openssh|vix)|edu\.mit|org\.(amavis|apache|cups|isc|ntp|postfi x|x)/{print $3}'
Password:
org.macosforge.xquartz.privileged_startx
com.rim.BBDaemon
com.rane.sl4.daemon
com.rane.sl3.daemon
com.rane.sl2.daemon
com.rane.sixtytwo.daemon
com.rane.sixtyone.daemon
com.rane.sixtyeight.daemon
com.oracle.java.Helper-Tool
com.microsoft.office.licensing.helper
com.machangout.glims.loader
com.logmein.logmeinserver
com.google.keystone.daemon
com.disc-soft.DAEMONTools.PrivilegedHelper
com.adobe.SwitchBoard
com.adobe.fpsaud
panoss-macbook:~ Panos$ launchctl list | sed 1d | awk '!/0x|com\.apple|edu\.mit|org\.(x|openbsd)/{print $3}'
com.growl.GrowlLauncher
com.logmein.CubbyHelper
com.Eltima.SyncMateServer
org.macosforge.xquartz.startx
com.rim.BBLaunchAgent
com.rim.RimAlbumArtDaemon
com.oracle.java.Java-Updater
com.machangout.glims.agent
com.logmein.logmeinguiagent
com.logmein.logmeingui
com.hp.messagecenter.launcher
com.hp.devicemonitor
com.google.keystone.system.agent
com.divx.update.agent
com.divx.dms.agent
com.facebook.videochat.Panos.updater
com.divx.agent.postinstall
com.adobe.ARM.de23d1e3aa2d00ce38d73f10fcbdc8dcaaaf6be989610710a1ddda77
com.adobe.ARM.202f4087f2bbde52e3ac2df389f53a4f123223c9cc56a8fd83a6f7ae
com.adobe.AAM.Scheduler-1.0
panoss-macbook:~ Panos$ ls -1A /e*/mach* {,/}L*/{Ad,Compon,Ex,Fram,In,Keyb,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Spo,Sta} * L*/Fonts 2> /dev/null
/Library/Components:
/Library/Extensions:
VBoxDrv.kext
VBoxNetAdp.kext
VBoxNetFlt.kext
VBoxUSB.kext
/Library/Frameworks:
AECore.framework
AEProfiling.framework
AERegistration.framework
Abracode.framework
AudioMixEngine.framework
Compressor.framework
ContactRender.framework
DSPPublishing.framework
DivX Toolkit.framework
FxPlug.framework
GData.framework
GlimsAdditions.framework
HPSmartPrint.framework
MacFUSE.framework
MediaServerAPI.framework
MindFortress.framework
NotesLib.framework
NyxAudioAnalysis.framework
OSXFUSE.framework
PMPluginsFramework4.framework
Pantomime.framework
PluginManager.framework
ProMetadataSupport.framework
Qmaster.framework
RIM_VSP.framework
RimBlackBerryUSB.framework
SIXTY-EIGHTApi.framework
SL2Api.framework
SL4Api.framework
SixtyOneApi.framework
SixtyTwoApi.framework
Sl3Api.framework
TSLicense.framework
XSKey.framework
iTunesLibrary.framework
/Library/Input Methods:
/Library/Internet Plug-Ins:
AdobeAAMDetect.plugin
AdobeExManDetect.plugin
AdobePDFViewer.plugin
AdobePDFViewerNPAPI.plugin
DirectorShockwave.plugin
DivXBrowserPlugin.plugin
Flash Player.plugin
Flip4Mac WMV Plugin.plugin
GlimsAdditions.webplugin
JavaAppletPlugin.plugin
LogMeIn.plugin
LogMeInSafari32.plugin
LogMeInSafari64.plugin
OVSHelper.plugin
Quartz Composer.webplugin
QuickTime Plugin.plugin
SharePointBrowserPlugin.plugin
SharePointWebKitPlugin.webplugin
Silverlight.plugin
flashplayer.xpt
nsIQTScriptablePlugin.xpt
/Library/Keyboard Layouts:
/Library/LaunchAgents:
com.adobe.AAM.Updater-1.0.plist
com.divx.dms.agent.plist
com.divx.update.agent.plist
com.google.keystone.agent.plist
com.hp.devicemonitor.plist
com.hp.messagecenter.launcher.plist
com.logmein.logmeingui.plist
com.logmein.logmeinguiagent.plist
com.logmein.logmeinguiagentatlogin.plist
com.machangout.glims.agent.plist
com.oracle.java.Java-Updater.plist
com.rim.BBAlbumArtCacher.plist
com.rim.BBLaunchAgent.plist
org.macosforge.xquartz.startx.plist
syncmateStarter.plist
/Library/LaunchDaemons:
com.adobe.SwitchBoard.plist
com.adobe.fpsaud.plist
com.apple.aelwriter.plist
com.apple.qmaster.qmasterd.plist
com.disc-soft.DAEMONTools.PrivilegedHelper.plist
com.google.keystone.daemon.plist
com.logmein.logmeinserver.plist
com.machangout.glims.loader.plist
com.microsoft.office.licensing.helper.plist
com.oracle.java.Helper-Tool.plist
com.rane.sixtyeight.daemon.plist
com.rane.sixtyone.daemon.plist
com.rane.sixtytwo.daemon.plist
com.rane.sl2.daemon.plist
com.rane.sl3.daemon.plist
com.rane.sl4.daemon.plist
com.rim.BBDaemon.plist
org.macosforge.xquartz.privileged_startx.plist
/Library/PreferencePanes:
Apple Qmaster.prefPane
Flash Player.prefPane
Flip4Mac WMV.prefPane
JavaControlPanel.prefPane
Launchpad-Control.prefPane
NTFS-3G.prefPane
OSXFUSE.prefPane
Perian.prefPane
SIXTY-EIGHT Audio Control Panel.prefPane
SL 2 Audio Control Panel.prefPane
SL 3 Audio Control Panel.prefPane
SL 4 Audio Control Panel.prefPane
Sixty-One Audio Control Panel.prefPane
Sixty-Two Audio Control Panel.prefPane
/Library/PrivilegedHelperTools:
SL2SettingsService
SL4SettingsService
SixtyEightSettingsService
SixtyOneSettingsService
SixtyTwoSettingsService
Sl3SettingsService
com.disc-soft.DAEMONTools.PrivilegedHelper
com.microsoft.office.licensing.helper
/Library/QuickLook:
QuickLookEyeTV.qlgenerator
iBooksAuthor.qlgenerator
iWork.qlgenerator
/Library/QuickTime:
AC3MovieImport.component
AppleHDVCodec.component
AppleIntermediateCodec.component
AppleMPEG2Codec.component
AppleProResCodec.component
DVCPROHDCodec.component
DVCPROHDMuxer.component
DVCPROHDVideoDigitizer.component
DVCPROHDVideoOutput.component
DVCPROHDVideoOutputClock.component
DVCPROHDVideoOutputCodec.component
DesktopVideoOut.component
DivX Decoder.component
DivX Encoder.component
FCP Uncompressed 422.component
Flip4Mac WMV Advanced.component
Flip4Mac WMV Export.component
Flip4Mac WMV Import.component
IMXCodec.component
Perian.component
/Library/ScriptingAdditions:
Adobe Unit Types.osax
Glims.osax
/Library/Spotlight:
Microsoft Office.mdimporter
iBooksAuthor.mdimporter
iWork.mdimporter
/Library/StartupItems:
VirtualBox
/etc/mach_init.d:
/etc/mach_init_per_login_session.d:
/etc/mach_init_per_user.d:
com.adobe.SwitchBoard.monitor.plist
Library/Address Book Plug-Ins:
SkypeABDialer.bundle
SkypeABSMS.bundle
Library/Fonts:
Library/Frameworks:
DotMacKit.framework
EWSMac.framework
MindFortress.framework
PMPluginsFramework.framework
PMPluginsFramework68kAligned.framework
SyncManagerCommon.framework
libical.framework
Library/Input Methods:
.localized
Library/Internet Accounts:
V1
Library/Internet Plug-Ins:
FacebookVideoCalling.bundle
Library/Keyboard Layouts:
Library/LaunchAgents:
com.adobe.AAM.Updater-1.0.plist
com.adobe.ARM.202f4087f2bbde52e3ac2df389f53a4f123223c9cc56a8fd83a6f7ae.plist
com.adobe.ARM.de23d1e3aa2d00ce38d73f10fcbdc8dcaaaf6be989610710a1ddda77.plist
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.9EA69D5D-CAF4-4CF6-8827-CCE 73BEC9A63.plist
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.AD6BE37E-A343-4019-AFF6-B02 3B57BFA11.plist
com.apple.FolderActions.enabled.plist
com.apple.FolderActions.folders.plist
com.divx.agent.postinstall.plist
com.facebook.videochat.Panos.plist
org.virtualbox.vboxwebsrv.plist
Library/PreferencePanes:
Library/Services:
OMCService.service
panoss-macbook:~ Panos$ osascript -e 'tell application "System Events" to get name of every login item' 2> /dev/null
iTunesHelper, Skype, Mail, Messages, Dropbox, BetterTouchTool, DockView
panoss-macbook:~ Panos$
If someone is able to help me with these I would really appreciate it. Thanks in advance.

Cross references
I have to force quit Mail almost every time I shut down my computer?
Every time my mac boots up I have recovered files.
… I suspect that at the time of the problems, there was a file system inconsistency. …

I keep getting the error message 'Adobe Illustrator CS6 is not working and needs to be shut down' in Windoes 8.

How do I stop this? I have lost a LOT of work...

c,
It may be a range of different things, I am afraid.
You may try the list, unless someone comes up with something brighter.
The following is a general list of things you may try when the issue is not in a specific file, and when it is not caused by issues with opening a file from external media. You may have tried/done some of them already; 1) and 2) are the easy ones for temporary strangenesses, and 3) and 4) are specifically aimed at possibly corrupt preferences); 5) is a list in itself, and 6) is the last resort.
If possible/applicable, you should save current artwork first, of course.
1) Close down Illy and open again;
2) Restart the computer (you may do that up to at least 5 times);
3) Close down Illy and press Ctrl+Alt+Shift/Cmd+Option+Shift during startup (easy but irreversible);
4) Move the folder (follow the link with that name) with Illy closed (more tedious but also more thorough and reversible), for CS3 - CC you may find the folder here:
https://helpx.adobe.com/illustrator/kb/preference-file-location-illustrator.html
5) Look through and try out the relevant among the Other options (follow the link with that name, Item 7) is a list of usual suspects among other applications that may disturb and confuse Illy, Item 15) applies to CC, CS6, and maybe CS5);
Even more seriously, you may:
6) Uninstall (ticking the box to delete the preferences), run the Cleaner Tool (if you have CS3/CS4/CS5/CS6/CC), and reinstall.
http://www.adobe.com/support/contact/cscleanertool.html

TS1702 IBooks application is shutting down after a few seconds of opening it.I reinstalled it again &still the same problem

IBooks application is not working properly!! It shuts down immediately after opening .I tried installing the app. Again and still the same problem!!

Will I lose my emails I have on there? I have numerous client email files and can't afford to lose any of them. I do have everything backed up but I'm fearful of losing important client info. What if something happened during the back up and it doesn't have my files?

Hi my trackpad is frozen and I also could not get force quit to work, I closed the top down and now I cannot get past the login and the cursor will not move, does anyone have any ideas

Hi my trackpad is frozen and I also could not get force quit to work, I closed the top down and now I cannot get past the login and the cursor will not move, does anyone have any ideas

Try these two steps:
Intel-based Macs: Resetting the System Management Controller (SMC)
Resetting your Mac's PRAM and NVRAM

My macbook pro will not shut down. It tells me that safari has cancelled shut down and to quit safari and try again, but every time I try to quit safari it won't let me. I need help...I don't know what to do.

My macbook pro will not shut down. It tells me that safari has cancelled shut down and to quit safari and try again, but every time I try to quit safari it won't let me. I need help...I don't know what to do.

Have you tried holding the power button down for several seconds? I would try the force quit as mentioned earlier first, or go to the Activity Monitor in Applications>Utilities and try force quit there.

How can I get the shortcut for forced quite to work from my keyboard.

The shortcut for forced quite stopped working from my apple keyboard. Is there any way I can reprogram it or do I need a new keyboard? When I use a logiteck keyboard the shortcut works. the esc key, command key, and option key work it just doesn't work as the short cut. Any help would be great, I don't want to buy a new keyboard.
We did just have the video card replaced, not sure if that would effect anything.
Thanks

The Apple keyboard has two Command and two Option keys. Did you try them all and in every different combination possible to rule out a defective key. You could also go Fullscreen and use Escape to exit Fullscreen to rule that one out. It reads like the keyboard is on its way out if the Logitech keyboard works. Also that would indicates that it's not a problem on the OS side. Hope that helps

Beachball again and again, force quit doesnt work

Hi there,
since this rubbish mountain cat (OS X 10.8.2) is on my Macbook Pro 13" mid 2009 Model (2.26 GHz Intel Core 2 Duo with 8 GB 1067 MHz DDR3) i got to shutdown/reboot it by the power button several times a week.
I get the beachball spinning over and over mostly in safari but also in itunes and other applications, then i am waiting for up to ten minutes each until i decide to just hold the power button for a forced shutdown.
Before Mountain Lion, everything was fine, never got any issues at all with two macbooks i own since Mac OS Tiger.
I used Disk Utility and Onyx to check the harddisk, did check and repair the Disk Permissions several times, alway sucessfully.
I deleted the two ".plist" which were mentioned in another post here and in other forums.
I dont and never did use 1Password.
Today i had the issue that i clicked to play a preview of a movie in the iTunes store, beachball came up, keystroke "command+alt/option+esc" for force quit didnt work, going to the force quit menu by clicking on the apple in the upper left corner did neither work as nothing in the list by clicking on the apple responded.
Then i tried to open terminal by invoking launchbar which also got frozen, after that i tried to open finder to get access to the terminal, but eventually the finder also got frozen. Six minutes later, beachball still spinning i had to hit the power button yet again.
Does someone has a clue how i could fix this behaviour?

@srourslaw
When i get the beachball then i cant close the application.
Just now, using safari, on a link and the beachball came up for no reason.
Alt/option+command+esc doesnt open the force quit menu.
First i could click the apple symbol, however when clicking there on "force quit"
nothing happened, no force quit menu showed up.
After all i wanted to quit the text app which was open, when i clicked on the text
application icon in the dock, it didnt react.
When i finally just tried to open the mail application from the dock, even the dock and
everything else got frozen and the fan of my macbook starts spinning really loud.
Now all i can do is moving the spinning beachball around the screen, everything else is frozen.
Only option left is shutting down the macbook by pressing the power button for 5 seconds :(

HT5361 The quit line in my mail application is not accessible and stops me from shutting down my computer (it displays a message saying that "mail has blocker shutdown"

? the quit option in my mail application is not accessible and stops me from shutting down. Does anyone know what is wrong? It started after my cable company installed a new router and modum.

Linda,
see the link on the right with the highlighted tick. In short click on the apple icon at top left and choose the wayward app from the 'force quit' dialogue. Another way is to put an icon in the dock for the Apple utility, "Activity Monitor". Set it to show all users processes and highlight that for the wayward app. The choose 'Quit Process'. BE CAREFUL, do not choose the low number processes which are fundamental operations for the whole OS.

Search function in Help not working in any application

The Search function is not working in any application's Help. Upon entering the terms I need help for I get a hang at "Searching..." but never any result. This problem started sometime in the last year or so. Prior to that the search function in Help worked fine. My network connectivity is excellent.
I recently reinstalled OS X 10.5 but I'm sure the problem existed before that and persisted after the reinstall.
The reinstall was due to upgrading to 10.7 and only then finding that I had lost needed functionality, but I don't think this has anything to do with the current problem. All other aspects of Help seem to be working fine
I don't find any reference to this problem anywhere so I'm hoping someone can help with my Help(!) problem. Thanks in advance.

Try running your Leopard install disk again, as well as the 10.5.8 combo updater. This might reinstall any 'missing bits'.
You can do this without deleting the hard drive, just install straight over your existing system, but close all applications and external devices first.
Or you could also do this via an Archive and Instal:
How to Archive & Install:
http://support.apple.com/kb/HT1710
and this also:
http://support.apple.com/kb/HT2196?viewlocale=en_US
This document explains how to correctly reinstall a prior version of Mac OS X in the event that other troubleshooting does not resolve an issue:
http://docs.info.apple.com/article.html?artnum=25404
BUT: Don't install older versions of Mac OS than what came with your computer:
http://support.apple.com/kb/HT2186?viewlocale=en_US

Forced quit not working as setup application cancels shut down

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