Slow Shutdown Problem

Recently, my iMac is experiencing unusually slow shutdown times.
Typical shutdown times were about 10 - 15 seconds.
Shutdown is now taking about 35 - 45 seconds, and occasionally, shutdown completely fails to occur.
This appears to have started with the update to OS X 10.10.3.
I have included a recent EtreCheck Report.
Problem description:
Slow Shutdown
EtreCheck version: 2.2 (132)
Report generated 4/23/15, 7:57 AM
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    iMac (21.5-inch, Mid 2011) (Technical Specifications)
    iMac - model: iMac12,1
    1 2.5 GHz Intel Core i5 CPU: 4-core
    16 GB RAM Upgradeable
        BANK 0/DIMM0
            4 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            4 GB DDR3 1333 MHz ok
        BANK 0/DIMM1
            4 GB DDR3 1333 MHz ok
        BANK 1/DIMM1
            4 GB DDR3 1333 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    AMD Radeon HD 6750M - VRAM: 512 MB
        iMac 1920 x 1080
System Software: ℹ️
    OS X 10.10.3 (14D136) - Time since boot: 0:1:54
Disk Information: ℹ️
    ST3500418AS disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Ken's HD (disk2) / : 498.88 GB (437.32 GB free)
            Encrypted AES-XTS Unlocked
            Core Storage: disk0s2 499.25 GB Online
    OPTIARC DVD RW AD-5690H
USB Information: ℹ️
    HP ENVY 110 series
    Griffin Technology, Inc. PowerWave Composite
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple, Inc. Keyboard Hub
        Apple Inc. Apple Keyboard
    Apple Computer, Inc. IR Receiver
    Apple Internal Memory Card Reader
Firewire Information: ℹ️
    G-TECH OEM ATA Device 00 800mbit - 800mbit max
        EFI (disk1s1) <not mounted> : 210 MB
        Boot OS X (disk1s3) <not mounted> : 134 MB
        Boot OS X (disk1s5) <not mounted> : 134 MB
        KLBackup (disk3) /Volumes/KLBackup : 150.19 GB (88.76 GB free)
            Encrypted AES-XTS Unlocked
            Core Storage: disk1s2 150.55 GB Online
        TimeMachineBackup (disk4) /Volumes/TimeMachineBackup : 348.75 GB (234.71 GB free)
            Encrypted AES-XTS Unlocked
            Core Storage: disk1s4 349.08 GB Online
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
    Mac App Store and identified developers
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.google.keystone.daemon.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [loaded]    com.shirtpocket.backupbytime.plist [Click for support]
User Login Items: ℹ️
    AirPort Base Station Agent    Application (/System/Library/CoreServices/AirPort Base Station Agent.app)
    Calendar    Application (/Applications/Calendar.app)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 17.0.0.169 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    AdobePDFViewerNPAPI: Version: 11.0.10 - SDK 10.6 [Click for support]
    AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Click for support]
    Flash Player: Version: 17.0.0.169 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    SharePointBrowserPlugin: Version: 14.4.9 - SDK 10.6 [Click for support]
    Silverlight: Version: 5.1.20913.0 - SDK 10.6 [Click for support]
    DirectorShockwave: Version: 12.0.2r122 - SDK 10.6 [Click for support]
Safari Extensions: ℹ️
    1-ClickWeather
    AdBlock
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
Time Machine: ℹ️
    Skip System Files: NO
    Mobile backups: OFF
    Auto backup: YES
    Volumes being backed up:
        Ken's HD: Disk size: 498.88 GB Disk used: 61.55 GB
    Destinations:
        TimeMachineBackup [Local]
        Total size: 348.75 GB
        Total number of backups: 65
        Oldest backup: 2014-08-18 16:35:10 +0000
        Last backup: 2015-04-23 10:45:16 +0000
        Size of backup disk: Adequate
            Backup size 348.75 GB > (Disk used 61.55 GB X 3)
Top Processes by CPU: ℹ️
         2%    WindowServer
         2%    fontd
         0%    HP Scanner 3
         0%    taskgated
         0%    dpd
Top Processes by Memory: ℹ️
    872 MB    kernel_task
    115 MB    mds_stores
    98 MB    mdworker(7)
    82 MB    opendirectoryd
    82 MB    loginwindow
Virtual Memory Information: ℹ️
    13.00 GB    Free RAM
    3.08 GB    Used RAM
    0 B    Swap Used
Diagnostics Information: ℹ️
    Apr 23, 2015, 07:54:16 AM    Self test - passed
    Apr 23, 2015, 04:53:26 AM    /Library/Logs/DiagnosticReports/firefox_2015-04-23-045326_[redacted].cpu_resour ce.diag [Click for details]
    Apr 23, 2015, 03:29:53 AM    /Library/Logs/DiagnosticReports/Disk Utility_2015-04-23-032953_[redacted].cpu_resource.diag [Click for details]
    Apr 22, 2015, 07:59:05 AM    /Library/Logs/DiagnosticReports/firefox_2015-04-22-075905_[redacted].cpu_resour ce.diag [Click for details]

Okey, want some more suggestions?
Check Device Manager when in Safe Mode. Any foul marks?
PCI devices in non-optimal slots: Place them in other.
Can you see what processes are running when shut down is in progress? (Does Ctrl+Alt+Del work with XP?)
You could also make it a Windows question:
When you order Windows to shut itself, it sends signals to all processes and gives them time to close down themselves, and if they don't do it in stipulated time Windows finishes them off. There is a Registry setting for the amount of time given by Windows, but I can't remember it now. But you can find it on the Internet I'm sure. Don't be too tight with the time though!
From your description one could guess, that something tries to prohibit shut down, or that a process can't find the driver to turn itself off.

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I've been googling and found some info about slow shutdowns but nothing helpful.
I'm running Macbook Pro mid-2012, 10.8.4 with an SSD. Usually the shutdown process takes 1-2 seconds but at least once a day it gets stuck and takes about 10+ seconds. I'll post my shutdown log. Maybe you can at least tell me what's causing it if it can't be fixed.
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http://www.upload.ee/download/3500786/13a862d8835fa8b3628/shutdown.txt.zip

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Library/Caches/Aviator
Library/Caches/AviatorEngine
Library/Caches/UpdateEngine-Temp/com.whitehatsec.aviator.dmg-etc.
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Library/Preferences/com.whitehatsec.aviator.plist
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Repair your drive. If you don't have Disk Warrior from Alsoft, best and better than Apple.
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Hi!
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I feel like it's for this exact reason that the Server isn't free - by only allowing those who need it - and are willing to put up a few bucks to purchase it, they have a lot fewer complaints. For example, I imagine that this server was also the reason that my MBP took a minute or two to go to sleep.
The reason *I* was using it, was because I wanted the fancy usage graphs that displayed my CPU, memory and network usage over time. But it's not worth the hassle. I'll find something else, or write a python script to create a CSV before I sacrifice the extra overhead this places on the system.
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Hello,
I’m using a dual 2.3 GHz G5, and it’s been working flawlessly since I bought it about a year ago. Until yesterday, I was running OS 10.4.5. Yesterday I upgraded to 10.4.7, and as soon as I booted up after the install, I started having a maddening problem with my computer randomly shutting down. (Not sleeping, but a complete power down.)
At first, the shutdown would happen immediately after powering up; my computer wouldn’t even make it to the blue progress bar. I zapped the PRAM and tried something I found online about unplugging the computer for 15 seconds, then plugging it back in. It now boots up, and I can log in, but the computer still shuts down randomly.
There seems to be no pattern to the shutdowns. I tried taxing the processor by opening and resampling huge Photoshop files while lots of other apps were open, and things were fine. Then it would conk out while I was composing an email.
I’ve heard of this random shutdown problem affecting Macbooks, but I have yet to find anything about G5 towers and OS 10.4.7. Does anyone have any info/advice?
Many thanks.
G5 dual 2.3 GHz Mac OS X (10.4.7) 2.5 GB RAM, 250 GB HD
G5 dual 2.3 GHz Mac OS X (10.4.7) 2.5 GB RAM, 250 GB HD

Thanks for the advice. I did check the system.log in Console and found the following altert:
PMU FORCED SHUTDOWN, CAUSE = -122
Now, since my computer is just over a year old, and since this problem happened immediately after applying the 10.4.7 OS update, I found it hard to believe that my hardware could be responsible. After 2 days of troubleshooting, I was stumped; after a 2-hour service call, so was Apple tech support. I ended up doing an archive and install back down to 10.4.5, and all is well.
I tested this issue on other machines running 10.4.7 and had no problems. It seems that the following specific combination of elements triggered the problem:
• PowerMac G5 dual 2.3 GHz (dual 1.8 machines did not exhibit the same problem)
• OS 10.4.7
• Logging in with Open Directory/Active Directory mobile profiles
• iTunes 7
Bottom line: if you’re using a dual 2.3 GHz PowerMac with mobile OD/AD profiles, do not update to 10.4.7, and steer clear of iTunes 7, at least until there is a patch update available.
(And Apple wants to be taken seriously in the enterprise market?)
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A few days ago I noticed that my clock was not showing in the menu bar in the upper right corner of my desktop.
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I then moved my cursor up to the menu bar in the upper right corner to see what would happen and the spinning beach ball started up but only for the original icons such as Bluetooth, Mobile Me (which I do not use), Time Machine, Spaces (doesn’t indicated the number when I switch Spaces, etc. The icons Norton Anti Virus and Tech Tool Pro in the menu bar are okay.
Also, when I attempt to shut down my computer the system clears the icons from my desktop except for a picture I have on my desktop and I get a gray wheel spinning and the system just hangs until I press and hold the on/off switch. I don’t know if the clock and shutdown problems are related.
The only new software I loaded recently was Skype with Logitech WebCam for the Mac and Quicken 2007 (Had a problem with Quicken 2006). They both are working okay.
And ideas on why I cannot get my clock to show up and my computer to shutdown?

You may have to consider a new post in the Hardware forum area for the computer
model and build/year; if there is a possibility of some basis the matter could be in
the machine and not the software running within it.
Your last two/three posts are in the Leopard 10.5(.8) forum area and do indicate
some kind of problem where troubleshooting the computer to discover if the matter
at hand would be either hardware or software based, may be the way to go.
The link to the 10.6 Snow Leopard forum won't be of help if your computer is a
PPC-based G5 tower, or other older pre-Intel configuration. And I remember
your earlier questions about the iMac G4 and some other issues in the past.
You may ask the moderators to put your post in a new thread of its own, in the
Leopard 10.5 area; so as to not 'piggy-back' another topic; even though some
of the odd issues you've had seem similar to this OP's topic line and appear to
be in the same general series of hardware. {The question here seems valid.}
The routine suggestions to check, test, verify, and perhaps repair or replace
the system; save a bootable clone to suitable external standalone device if
testing a suspect computer's viability is recommended; and the basics if not
already tried to help isolate the issue(s) as you've posted elsewhere, may be
of some help to try and do; so in that matter, a new thread of your own is best
for your own directed feedback. Since this kind of advice applies to most any
situation, including troubleshooting what may be hardware or software, I'm
adding my two and three-tenths cents worth here.
Your original included Apple Hardware Test may be of some help, in the process
of elimination; but is not conclusive, so other methods would be also suggested.
Some ideas appear to cover the same ground. However, system corruption or
disc failure can also manifest itself in odd ways & affect things indirectly for a time.
• OS X Maintenance And Troubleshooting
http://www.macattorney.com/ts.html
• Mac OS X BASIC TROUBLESHOOTING & MAINTENANCE
http://www.gballard.net/macrant/osx_troubleshooting.html
• Troubleshooting Tips for computers:
http://www.stcdio.org/offices/cem/mediaandtechnology/cem-computer-classes/troubl eshooting.html
So, at the risk of inadvertently alienating the OP, I am posting this as
a general help to following readers at some later time; and it may not
be too simple for a refresh course.
Some software issues can be resolved by repairing disk permissions,
and re-applying the last OS X update Combo file over the same one
already in the system; or if not up-to-date already, check & repair all
the general items and then apply the last Combo update.
A too-full hard disk drive can compromise the system integrity, so that
is a matter of course to keep up on what resources exist and remain
for the OS X to function correctly and for apps to multi-task together.
However that works out...
Good luck & happy computing!

Are the replacement Heatsinks fixing people's Random Shutdown problems?

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Is it working for people who've had it done recently?

Does this max out the CPU?
Yes. People who advocate this are testing to see if it's possible to induce a "random" shut down.
Why would anyone want to do that?
Good question. I've seen two reasons put forward: (a) It's better to make it happen now yourself rather let it strike out of the blue at some later date (and if running this test doesn't induce RSDs you can feel confident that your computer is probably immune); (b) If you take your MacBook to an Apple Store it could be useful for demonstrating to an Apple "genius" that your computer has the problem, especially if your shutdowns are infrequent.
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