Slow iMac after 10.8.3 update

I posted a few dfays ago an as yet have no responeses from that post so here goes again.
When I restart to Windows (7) the startup chime chimes almost immediately but then a blank canvas screen comes on and the computer just sits there seemingly doing nothing for nearly a minute, then Windows starts and things look normal. When I go back to Mac OS the chime chimes again almost immediately but I get a black, blank screen for about 40 seconds before the Apple logo comes up and the wheel start spinning and the Mac starts up. Everything seems to be normal once it os going with the exception that once and a while I have to restart the computer again in ML to get the Dock to magnify. This all started after I updated to ML 10.8.3. Windows is on a partition made by Bootcamp Assistant to the tune of 40 GB. That leaves me with 250+ GB for ML. The iMac is an early 2009 320/4GB Ram and there are not many third party apps installed except the ones I have to install for Windows and some sites that require Adobe and Java to run, which are both up to date according to there sites. My question is, why does the computer do this suddenly after an upgrade to ML when it never did this before? Also then I restarted the computer in Recovery and verified and repaired the OS and then restarted the Mail app showed I was offline and I had to restart again to rectify the problem. Just seems like the upgrade did more harm than good!
I am getting very close to going back to SL, the last good OS Apple put out, where I had very few problems with any of this stuff. I really like some of the new stuff Lion and ML had to offer but the problems are getting to the point where it is not worth the effort. Suggestions would be appreciated.
C

Try booting into the Safe Mode. Shut down the computer and then power it back up. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart. For each disable/delete, you will need to restart if you don't do them all at once.
Safe Mode
Safe Mode - About
General information.
Isolating issues in Mac OS X
Troubleshooting Permission Issues
Step by Step to Fix Your Mac
Upgrade Nightmares

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Macbook Pro running slow/(crawling) after 10.9.4 update

I paste in information on the system from EtreCheck below.
The Macbook is really crawling very slowly.
It may be a coincidence, but happened when I restarted after the latest software update 1st july from OSX 10.9.3 to OSX 10.9.4
Regarding How does it behave/How slow:?
Now, every task that may require the use of resources not recently used (menus, lists etc.) will take exceedingly long time. For example after the desktop appears with the top menu, it will take 3-4 min before any menus can be pulled down, same with dock, 3-4 min to show up. Clicking an app, 3-4 min before launches. Then after launched, some apps may run OK, for example Logic Pro.
When working in the Finder. Opening a folder may take 3-4 min, before the the file list shows. Then selecting a file - takes a minute before it gets hi-lighted. But is then fast to drag to an open folder on the backup drive. Copying a folder to a backup drive, is also fast.
Another example: It took two hours from logging in at this Forum, until getting here to post.!! (I'll read answers from another machine)
What I have done:
I have backed up with Time Machine,, in addition to manually backing up files.
I have ran Disk Utility and it reports the hard disk is OK. I have ran fix permission, only two were fixed. No difference.
I have reset the System Management Controller (SMC). No difference.
It is not a network problem, My network is fast and smooth with other devices,
I don't want to change hard drive 'just in case'. It fast to restore files from the backup. However
I have many licences apps and contents which will take several weeks to restore. I've done that before.
Is it likely that it is the hard disk that is failing without disk utility having a clue?
SYSTEM -INFO:
EtreCheck version: 1.9.12 (48)
Report generated 10 Jul 2014 12:06:30 GMT+2
Hardware Information:
MacBook Pro (13-inch, Late 2011) (Verified)
MacBook Pro - model: MacBookPro8,1
1 2.8 GHz Intel Core i7 CPU: 2 cores
4 GB RAM
Video Information:
Intel HD Graphics 3000 - VRAM: 384 MB
Color LCD 1280 x 800
System Software:
OS X 10.9.4 (13E28) - Uptime: 0 days 2:7:15
Disk Information:
TOSHIBA MK7559GSXF disk0 : (750,16 GB)
EFI (disk0s1) <not mounted>: 209,7 MB
Macintosh HD (disk0s2) / [Startup]: 749,3 GB (571,85 GB free)
Recovery HD (disk0s3) <not mounted>: 650 MB
MATSHITADVD-R   UJ-8A8
USB Information:
Seagate Expansion Desk 2 TB
EFI (disk1s1) <not mounted>: 209,7 MB
Seagate Expansion Drive (disk1s2) /Volumes/Seagate Expansion Drive: 2 TB (1,74 TB free)
Apple Computer, Inc. IR Receiver
Apple Inc. FaceTime HD Camera (Built-in)
Apple Inc. BRCM2070 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. Apple Internal Keyboard / Trackpad
Thunderbolt Information:
Apple Inc. thunderbolt_bus
Gatekeeper:
Mac App Store and identified developers
Kernel Extensions:
[not loaded] com.zoom.R16USBAudioDriver (1.4.0 - SDK 10.6) Support
[not loaded] jp.co.roland.RDUSB0127Dev (1.0.0) Support
Startup Items:
RDUSB0127Startup: Path: /Library/StartupItems/RDUSB0127Startup
Problem System Launch Daemons:
[failed] com.apple.msrpc.netlogon.plist
Launch Daemons:
[loaded] com.adobe.fpsaud.plist Support
Launch Agents:
[invalid] entries
[running] com.zoom.R16DeviceManager.plist.svn-base Support
[running] com.zoom.R16DeviceManager.plist Support
User Launch Agents:
[failed] com.fastestyoutubedownloader.TrialExpired.GoldFreeFirstWeek.plist Support
User Login Items:
iTunesHelper
Internet Plug-ins:
FlashPlayer-10.6: Version: 13.0.0.214 - SDK 10.6 Support
Flash Player: Version: 13.0.0.214 - SDK 10.6 Outdated! Update
QuickTime Plugin: Version: 7.7.3
Default Browser: Version: 537 - SDK 10.9
Audio Plug-ins:
BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
AirPlay: Version: 2.0 - SDK 10.9
AppleAVBAudio: Version: 203.2 - SDK 10.9
iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
3rd Party Preference Panes:
Flash Player Support
GR-55 Support
ZOOM R16ControlPanel Support
Time Machine:
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 697.84 GB Disk used: 165.26 GB
Destinations:
Seagate Expansion Drive [Local] (Last used)
Total size: 2
Total number of backups: 17
Oldest backup: 2014-07-04 07:43:35 +0000
Last backup: 2014-07-10 10:39:24 +0000
Size of backup disk: Adequate
Backup size 2 > (Disk used 165.26 GB X 3)
Time Machine details may not be accurate.
All volumes being backed up may not be listed.
Top Processes by CPU:
      0% hidd
      0% WindowServer
      0% RDUSB0127Setupd
      0% SystemUIServer
      0% Finder
Top Processes by Memory:
219 MB mds_stores
70 MB Finder
61 MB Safari
57 MB WindowServer
41 MB mds
Virtual Memory Information:
1.71 GB Free RAM
1.15 GB Active RAM
131 MB Inactive RAM
1.01 GB Wired RAM
255 MB Page-ins
0 B Page-outs

Thanks Melophage
You ask some (5) questions regarding the output of Etrecheck
Re #4 :"Have you tried uninstalling the fastestyoutubedownloader.com user launch agent, in case that’s causing a problem?"
Yes, now I have. Now it takes 40 min. from powerup to the login screen.!
My system report showed as I posted, before the removal:
"User Launch Agents:
[failed] com.fastestyoutubedownloader.TrialExpired.GoldFreeFirstWeek.plist"
I am ignorant about the matter. I too was surprised to find that item and the conspiracy deamon on my left shoulder had wild thoughts.
The app that generated the Launch Agent must have been FastestYouTubeDownloader.app,
It was downloaded as an app and no uninstaller. I think it was supposed to run fast the first week, and if you paid for it(upgrade license), it would remain fast or else work slowly. I tried it on one file and then threw it in the trash, as I would have no more use for it. But a nagging/promo dialog telling me the trial period was over came up 1st july, while the nagging came up I was notified (by appstore) that a new update of my system required a restart. I pressed that, my system was updated to 10.9.4 and after the update everything was slow. So the conspiracy deamon was whispering that maybe the app had made everything slow, by mistake, and not just the FastestYouTubeDownloader.
I really don't think so.
But I think the developers have to leave a mark somewhere to tell them that I have tried the software and maybe they have chosen the User Launch Agent for this? Then trying to remove it may just cause more problems, since it is not anything I should be able to do for obvious reasons.
I couldnt see what it was really doing from its content, it seems to me it should do nothing if the application was not found.
Re # 1 and #2
I have had these drivers all the time and not experienced problems with earlier versions of Mavericks.
Also, the ZOOM and the GR-55 is not connected.
Both had at least their own kernel-extension, a launch agent and a preference panel, but possibly more.
But I have now tried the Uninstaller that accompanies the GR-55 driver to remove it. It gave no improvements.
Re # 5
I have apperently two Flash Players, both have the same version number, one is outdated.?
Probably not good, but probably not my main problem(s).? I'm not using Flash often.
Re # 3
I have no idea, what the following listing
Launch Agents:
[invalid] entries
may refer to. In my HD/Library/LaunchAgents folder I only have
"com.zoom.R16DeviceManager.plist" the other entry in the report with same file name with added extension ".svn-base" I have no idea where is coming from.
I think this is not my primary problem though? even if I am curious where it comes from.
My Conclusions
Obviously with a boot time of more than 45 min doing diagosics and tests takes long time.
The Disk Utility verifies the disk as OK.   Onyx verifies the disk as OK (mabe the same test?).
I think my maachine is just getting worse. There must be a serious problem, not just a fine tuning issue.
The conspiracy deamon on my other sholder tells me that Apple have decided its time for me to buy a new computer again :-) ,It would have been a good idea if not for the pain of reinstalling licensed software which will require a 2 week vacaition doing nothing but restoring, Possibly having to purchase new licences costing more than the computer.

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Having searched the forums I haven't come up with people experiencing a similar problem.
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Hello,
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Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
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☞ Open LaunchPad and start typing the name.
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http://support.apple.com/kb/HT1564
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Hi,
I'm experiencing a really slow boot time after updating to 10.4.3.
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Nov 23 16:07:04 localhost kernel[0]: IPv6 packet filtering initialized, default to accept, logging disabled
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Nov 23 16:07:05 localhost diskarbitrationd[33]: disk0s3 hfs 8EB46343-98A2-3545-835D-FEE52DE4DA60 Blanche /
Nov 23 16:07:06 localhost lookupd[58]: lookupd (version 365) starting - Wed Nov 23 16:07:06 2005
Nov 23 16:07:08 localhost kernel[0]: ATY,ChockStone_A: vram [a0000000:10000000]
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Hi,
I have the same problem. My iMac also hangs for about one minute at the same place;
"Nov 23 16:07:04 localhost kernel[0]: IPv6 packet filtering initialized, default to accept, logging disabled
Nov 23 16:07:04 localhost kernel[0]: UniNEnet: Ethernet address 00:11:24:86:33:46"
but with a different MAC address ofcourse.
I 've run the maintenance scripts and repaired permissions using Onyx but it did no difference.
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http://discussions.apple.com/thread.jspa?threadID=1246278&tstart=0
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Jazamin

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Hi,
I have the same problem. My iMac also hangs for about one minute at the same place;
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iMac DV/450

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