IMac OS X Leopard 10.5.7 won't shut down completely or restart

Doing a shutdown or restart, all applications quit, and the screen goes black, but the machine never completes the shutdown. I have waited up to 30 minutes for it to complete. Looking at the Console's system log shows the last thing it was doing before I manually restart is that it is hung at the following line:
Jun 11 08:24:45 Petes-iMac com.apple.SystemStarter[32]: Starting Aventail OnDemand Daemon...
This daemon is associated with Aventail, which I don't believe I have installed on this computer, and I can't seem to find in any library.
Any ideas on where to find it? I assume it is not part of Leopard, and is a remnant from some other application and can be safely removed? Any idea how to find it?
Thanks,
Pete

Hi Pete:
If you have not done so, do a "find" on aventail (be sure you search for system files as well).
I have never heard of the application until I Googled it as a result of your question. It appears to be high-powered (and expensive) security software. I do not know what might have installed it.
Barry

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My computer won't shut down, it just restarts

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First welcome to the discussions.
The first thing I would do is Repair Permissions.
http://discussions.apple.com/thread.jspa?messageID=607640&#607640
After reading all the reports on Norton and disruptive behavior it causes in OSX I would recommend UnInstalling it.
You might have an issue with something else causing your problem but reading through the link above and UnInstalling Norton is a good start to isolate your issue.
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MacBook Pro(2007) won't shut down completely

MacBook Pro(2007)-Leopard
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Here is the thing: My iMac (late 2009, 24", 8 GB RAM) won't shut down when I use my external HD for Time Machine. After the back up I try to eject the external HD but the icon won't disappear on the screen, it only gets blank and is not clickable anymore. It is still visible in the menu of the Finder but with no ejection sign anymore. Programs that were open before won't close even if I use the forced shut down function. But it seems like they are closed as they don't appear on the list anymore. When I then try to shut down the whole system the screen goes black and the wheel turns for hours! So that I finally have to shut it down manually.
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Okay, just realized that the same problem occurs with the MBP after rejecting the external HD
Icon gets blank, cannot be clicked anymore, while shutting down the MBP normally the screen goes black and the wheel is turning forever but nothing else happens. So I have to force it to shut down.
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Imac running 10.7.3 won't shut down

Hi,
I have a new imac 3.4ghz - i7 with 16gbs ram that won't shut down unless I hold in the power button. Any idea what may be causing the issue. I checked the Console logs but that did not give me any indication of what might be hanging it up. I also, have a Macbook Pro running 10.6.8 and it has no trouble powering down.
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Contact Apple's Express Lane.

Imac won't shut down, blue screen with spinig wheel is on and computer never shuts until I hold the power button down and shut it manualy..

Imac won't shut down,
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This is the instruction article for Intel-based Macs:
http://support.apple.com/kb/HT3964
Your profile does not indicate the type of Mac you are using.
Barry

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i'm a little concerned that i'm damaging the external drive by turning it off manually all the time..
thanks

Some hard drives shut off with shutdown, some don't. Sometimes hard drives that did shut off with one system will not do the same with a different system. My hard drives which did shut off, prior to 10.5 now stay on.
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-mj
[email protected]

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Hi and welcome to Discussions,
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CBuss,
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Also, when this happens, the computer won't shut down. Clicking "Shut Down" will remove the top menu panel, but then it just sits there...forever...
I was hoping the latest update would fix this problem but it hasn't. I'm not running Quicksilver as some other posts have mentioned. I'm using both Camino & Safari for web browsers, iTunes, and EyeTV...that's it...
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Ok, I think I found more information here and was hoping someone could confirm. I have a Windows share that I mount to the Mac via SMB. If I shut down the Windows PC while the drive is still mounted on the Mac, I experience these problems. Particularly the not being able to shut down part.
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When i try to shut down the computer it quits the finder app. and says something has timed out and it won't shut down all it does is quit the finder app.

OK. That's not good. Suggests that the problem is with the system. Sometimes this is caused by a bad cache or log file but it's hard to tell. The next thing to try, then, is to use a utility such as Snow Leopard Cache Cleaner or similar utility - CNet Downloads or MacUpdate - to clear out system, user, and font cache files. You should also repair the hard drive just to be sure:
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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 Utilities menu. 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 click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
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Also, open the Console utility in your Utilities folder and see if there are any console messages around the time of your last shutdown/restart that might indicate what failed to quit.

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After further investigation it seems to be related (at least in my case) to a bug that affects firefox and 10.5.3 update.
Have a look here:
http://discussions.apple.com/thread.jspa?threadID=1541870
and here:
https://bugzilla.mozilla.org/show_bug.cgi?id=436575

My macbook pro won't shut down, restart or log off

it's a month old. was behaving fine until about a week ago when it wouldn't shut down because itunes kept restarting itself whenever i quit. realised it was because of my alarm clock widget, which i've now removed. so the itunes is sorted, BUT, my mac still won't shut down.
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Don't upgrade to Snow Leopard in the hope that it will eliminate any preexisting problems on your MBP — it almost certainly won't, and you may have other problems as well (e.g., incompatible applications and startup items). Solve the problem first, then perform the upgrade.
If you Safe Boot the computer, will it shut down normally afterward? If so, disable all third-party startup items (System Preferences > Accounts > select your account and click the Startup Items tab), boot normally, and test again. If you can still shut down normally, one of the startup items is at fault. Re-enable them one at a time, testing after each addition, until you determine which one is causing the problem.
There are also applications that can run in the background and don't show up in the Force Quit dialog box — but they do appear in Activity Monitor when you instruct it to list Active Processes. Some can interfere with shutdown by refusing to quit when the Shut Down command is given. If the suggestion in the preceding paragraph yields no progress, let us know what processes are active on your computer when no applications are shown in the Force Quit dialog box.

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I have a 2011 iMac (2.8 GHz, Intel Core i7)
I recently updated to 10.10.2.
Things were working fine, but now my iMac won't shut down.
I go to the Apple in the upper left corner... Click on "shut down"... but then nothing happens.
Normally, there is a little prompt window asking if I really want to shut my computer down, or something, but that window has stopped popping up.
And that's it. My Mac just stays on. I then have to hold down the power button to get it to shut down.
And, now, my screensaver won't come on. Not even if I try to force it on. It just refuses to come on.
Any ideas on what happened and how to fix it??
Thanks!

Try these in order testing your system after each to see if it's back to normal:
1. a. Resetting your Mac's PRAM and NVRAM
    b. Intel-based Macs: Resetting the System Management Controller (SMC)
2. Restart the computer in Safe Mode, then restart again, normally. If this doesn't help, then:
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the Utilities menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
3. Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the Utilities menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. 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 click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu. Select Restart from the Apple menu.
4. Reinstall Yosemite: Reboot from the Recovery HD. Select Reinstall OS X from the Utilities menu, and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible
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5. Reinstall Yosemite from Scratch:
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
How to Clean Install OS X Yosemite
Note: You will need an active Internet connection. I suggest using Ethernet if possible
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IMac OS X Leopard 10.5.7 won't shut down completely or restart

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