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IMac Intel 27 ". EMC 2309 (fin 2009, Core 2 Duo 3.06 ou 3.33 GHz), EMC 2374 (fin 2009, Core i5 2.66 GHz ou Core i7 2.8 GHz)

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Sudden drop to half performance. Hardware issue?

Hi Folks

My iMac suddenly drop to half performance and i can't spot the reason why. I have lately installed SSD(evo850) drive in my iMacLate09 (i7) and the performance was very good for long time 2000+ geekbench. Then all of a sudden the performance is half. I have trim enabled from the start, half the SSD drive is free 168gb free out of total 250gb. My system is a copy of my iMac11 and i see no performance drop on iMac11 that i spend 10times more time on that the iMac09.

I just made a clean install of OSX on iMac09 and then benchmark right after, but still low score ~900

On my install of the SSD in september managed to burn the internal display port so i run the iMac via external monitor ever since i got the first high score of 2000+


Further details:

Image: Low score 12 Dec (half of normal):

Dec12 test _ Low score _half.jpg

Block Image

Image: High score 27 Sep:

Sep27 test _ High score.jpg

Block Image


SSD specs, trim enable + 50% free space.

Sdd_stats_trim enabled 168gb free space


Other than that:

Disk speeds are running fine around 250 mb/s close to same speed as in september. What i can expect to get in a sata2 logic board with a 6gb/s SSD.

Block Image

Screenshot of Activity Monitor just after completed benchark

Block Image

My tests are a lot lower than the average iMac 2009

Block Image


I ran benchmark from old HDD drive where i have Lion OSX installed but same low score of 900..


-- Do you know what the problem can be and what a potential solution could be? I plan to change the logic board to get my display port running again, but not worth it if mac as not coming back to normal speeds.

Best regards Mads

iMac, OS X Yosemite (10.10.4)


Here is an EtreCheck of old system before clean install, might not be to relevant since i din't think it's a software issue:

EtreCheck version: 2.6.6 (226)

Report generated 12/12/15 22:30

Runtime 3:19

Download EtreCheck from

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: (What does this mean?)

iMac (27-inch, Late 2009)

[Click for Technical Specifications]

[Click for User Guide]

iMac - model: iMac11,1

1 2.8 GHz Intel Core i7 CPU: 4-core

12 GB RAM Upgradeable

[Click for upgrade instructions]


4 GB DDR3 1067 MHz ok


2 GB DDR3 1067 MHz ok


4 GB DDR3 1067 MHz ok


2 GB DDR3 1067 MHz ok

Bluetooth: Old - Handoff/Airdrop2 not supported

Wireless: en1: 802.11 a/b/g/n

Video Information: (What does this mean?)

ATI Radeon HD 4850 - VRAM: 512 MB

SONY TV 1920 x 1080

System Software: (What does this mean?)

OS X Yosemite 10.10.4 (14E46) - Time since boot: about one hour

Disk Information: (What does this mean?)

ST31000528ASQ disk0 : (1 TB) (Rotational)

EFI (disk0s1) <not mounted> : 210 MB

iMac (disk0s2) /Volumes/iMac : 999.35 GB (84.19 GB free)

Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB

Samsung SSD 850 EVO 250GB disk1 : (250,06 GB) (Solid State - TRIM: Yes)

EFI (disk1s1) <not mounted> : 210 MB

samsung (disk1s2) / : 249.20 GB (168.11 GB free)

Recovery HD (disk1s3) <not mounted> [Recovery]: 650 MB

USB Information: (What does this mean?)

Apple Inc. BRCM2046 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Internal Memory Card Reader

Toshiba External USB 3.0 500,11 GB

EFI (disk2s1) <not mounted> : 210 MB

1 - 500MB_Toshiba 52gbfree (disk2s2) /Volumes/1 - 500MB_Toshiba 52gbfree : 499.76 GB (70.37 GB free)

Apple Inc. Built-in iSight

Apple Computer, Inc. IR Receiver

Configuration files: (What does this mean?)

/etc/sysctl.conf - File exists but not expected

/etc/hosts - Count: 62

Gatekeeper: (What does this mean?)

Mac App Store and identified developers

Kernel Extensions: (What does this mean?)


[not loaded] com.parallels.kext.hypervisor (10.1.4 28883 - SDK 10.7) [Click for support]

[not loaded] com.parallels.kext.netbridge (10.1.4 28883 - SDK 10.7) [Click for support]

[not loaded] com.parallels.kext.usbconnect (10.1.4 28883 - SDK 10.7) [Click for support]

[not loaded] com.parallels.kext.vnic (10.1.4 28883 - SDK 10.7) [Click for support]


[loaded] at.obdev.nke.LittleSnitch (4212 - SDK 10.8) [Click for support]

[not loaded] com.sophos.kext.sav (9.4.50 - SDK 10.9) [Click for support]

[not loaded] com.sophos.nke.swi (9.4.50 - SDK 10.9) [Click for support]

[not loaded] com.wacom.kext.ftdi (1 - SDK 10.10) [Click for support]

[not loaded] com.wacom.kext.wacomtablet (6.3.14 - SDK 10.10) [Click for support]

[not loaded] org.cindori.TrimEnabler (1 - SDK 10.10) [Click for support]


[loaded] com.Cycling74.driver.Soundflower (1.6.6 - SDK 10.6) [Click for support]

[loaded] com.Cycling74.driver.WondershareAudioDevice (1.5.2) [Click for support]

[loaded] com.shapeservices.msm.driver.MSMFramebuffer (3.3.2 - SDK 10.6) [Click for support]

[loaded] com.shapeservices.msm.driver.MSMVideoDevice (3.3.2 - SDK 10.6) [Click for support]

[loaded] com.splashtop.driver.SRXDisplayCard (1.6 - SDK 10.9) [Click for support]

[loaded] com.splashtop.driver.SRXFrameBufferConnector (1.6 - SDK 10.9) [Click for support]

[loaded] virtualcdrw.driver (1.0 - SDK 10.7) [Click for support]


[not loaded] com.Leaf.driver.LeafFwXDriverMatcher (1.2.0d1) [Click for support]


[not loaded] com.devguru.driver.SamsungACMControl (1.4.14 - SDK 10.6) [Click for support]

[not loaded] com.devguru.driver.SamsungACMData (1.4.14 - SDK 10.6) [Click for support]

[not loaded] com.devguru.driver.SamsungComposite (1.4.14 - SDK 10.6) [Click for support]

[not loaded] com.devguru.driver.SamsungMTP (1.4.14 - SDK 10.5) [Click for support]

[not loaded] com.devguru.driver.SamsungSerial (1.4.14 - SDK 10.6) [Click for support]

/Volumes/iMac/Incompatible Software/Parallels

[not loaded] com.parallels.kext.prl_hid_hook (7.0 15094.749908) [Click for support]

[not loaded] com.parallels.kext.prl_hypervisor (7.0 15094.749908) [Click for support]

[not loaded] com.parallels.kext.prl_netbridge (7.0 15094.749908) [Click for support]

[not loaded] com.parallels.kext.prl_usb_connect (7.0 15094.749908) [Click for support]

[not loaded] com.parallels.kext.prl_vnic (7.0 15094.749908) [Click for support]

Startup Items: (What does this mean?)

FanControlDaemon: Path: /Library/StartupItems/FanControlDaemon

TuxeraNTFSUnmountHelper: Path: /Library/StartupItems/TuxeraNTFSUnmountHelper

Startup items are obsolete in OS X Yosemite

Launch Agents: (What does this mean?)

[running] at.obdev.LittleSnitchUIAgent.plist [Click for support]

[loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]

[failed] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a...plist [Click for support]

[loaded] com.adobe.CS5ServiceManager.plist [Click for support]

[running] com.extensis.FMCore.plist [Click for support]

[loaded] [Click for support]

[loaded] com.splashtop.streamer-for-root.plist [Click for support]

[running] com.splashtop.streamer-for-user.plist [Click for support]

[running] com.wacom.wacomtablet.plist [Click for support]

[running] virtualcdrw.daemon.plist [Click for support]

Launch Daemons: (What does this mean?)

[loaded] ag.shape.MSMToolHelper.plist [Click for support]

[running] at.obdev.littlesnitchd.plist [Click for support]

[loaded] com.adobe.ARMDC.Communicator.plist [Click for support]

[loaded] com.adobe.ARMDC.SMJobBlessHelper.plist [Click for support]

[loaded] com.adobe.SC.FPFeedbackService-1.0.plist [Click for support]

[loaded] com.adobe.SwitchBoard.plist [Click for support]

[loaded] com.adobe.fpsaud.plist [Click for support]

[loaded] com.macpaw.CleanMyMac2.Agent.plist [Click for support]

[loaded] com.macpaw.CleanMyMac3.Agent.plist [Click for support]

[loaded] [Click for support]

[loaded] [Click for support]

[running] com.splashtop.streamer-daemon.plist [Click for support]

[running] com.splashtop.streamer-srioframebuffer.plist [Click for support]

[loaded] org.cindori.SenseiTool.plist [Click for support]

[loaded] org.cindori.TEAuth.plist [Click for support]

User Launch Agents: (What does this mean?)

[loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]

[loaded] com.adobe.ARM.[...].plist [Click for support]

[loaded] com.bittorrent.uTorrent.plist [Click for support]

[loaded] [Click for support]

[loaded] com.macpaw.CleanMyMac3.Scheduler.plist [Click for support]

[loaded] com.redgiantsoftware.updater.plist [Click for support]

[running] com.spotify.webhelper.plist [Click for support]

User Login Items: (What does this mean?)

Macs Fan Control Application (/Applications/Macs Fan

iTunesHelper Application (/Applications/

Flux Application (/Applications/

Awareness Application (/Applications/

Alfred 2 Application (/Applications/Alfred

Dropbox Application (/Volumes/iMac/Applications/

Copy Application (/Volumes/iMac/Applications/

RescueTime Application Hidden (/Applications/

CleanMyMac 3 Menu Application (/Applications/CleanMyMac 3

VirtualCDRW Application (/Applications/

MEGAsync Application (/Applications/

Other Apps: (What does this mean?)

[running] Chrome

[running] Snitch Network Monitor

[running] com.copy.agent.247396

[running] com.crystalidea.MacsFanControl.51152

[running] com.etresoft.EtreCheck.15936

[running] com.futureproof.awareness.134932

[running] com.getdropbox.dropbox.250520

[loaded] com.lsreset


[running] com.primatelabs.mas.Geekbench3.458976

[running] com.rescuetime.RescueTime.50584

[running] com.runningwithcrayons.Alfred-2.50300

[running] com.wacom.TabletDriver.58820

[running] com.wacom.WacomTouchDriver.55696

[running] mega.mac.92900

[running] org.herf.Flux.49164


Internet Plug-ins: (What does this mean?)

AdobeAAMDetect: Version: AdobeAAMDetect - SDK 10.6 [Click for support]

FlashPlayer-10.6: Version: - SDK 10.6 [Click for support]

Default Browser: Version: 600 - SDK 10.10

AdobePDFViewerNPAPI: Version: 15.008.20082 - SDK 10.8 [Click for support]

AdobePDFViewer: Version: 15.008.20082 - SDK 10.8 [Click for support]

Flash Player: Version: - SDK 10.6 Cannot contact Adobe

QuickTime Plugin: Version: 7.7.3

SharePointBrowserPlugin: Version: 14.0.0 [Click for support]

WacomTabletPlugin: Version: WacomTabletPlugin - SDK 10.9 [Click for support]

JavaAppletPlugin: Version: Java 8 Update 60 build 27 Check version

Safari Extensions: (What does this mean?)


Open in Internet Explorer


3rd Party Preference Panes: (What does this mean?)

Flash Player [Click for support]

FUSE for OS X (OSXFUSE) [Click for support]

Java [Click for support]

Tuxera NTFS [Click for support]

WacomTablet [Click for support]

Time Machine: (What does this mean?)

Skip System Files: NO

Mobile backups: OFF

Auto backup: YES

Volumes being backed up:


Seagate 4tb [Local]

Total size: 4.00 TB

Total number of backups: 0

Oldest backup: -

Last backup: -

Size of backup disk: Excellent

Backup size 4.00 TB > (Disk size 0 B X 3)

Top Processes by CPU: (What does this mean?)

20% Google Chrome Helper(17)

11% Google Chrome

6% WindowServer

4% kernel_task

0% fontd

Top Processes by Memory: (What does this mean?)

1.51 GB Google Chrome Helper(17)

952 MB kernel_task

430 MB mds_stores

283 MB

270 MB Finder

Virtual Memory Information: (What does this mean?)

5.99 GB Free RAM

6.00 GB Used RAM (1.94 GB Cached)

0 B Swap Used

Diagnostics Information: (What does this mean?)

Dec 12, 2015, 09:14:16 PM ~/Library/Logs/DiagnosticReports/Finder_2015-12-12-211416_[redacted].crash

Dec 12, 2015, 09:13:54 PM Self test - passed

Répondre à cette question J'ai le même problème

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Anyone that has a clue?


First get rid of that Clean My Mac BS. Next check to see that all of your RAM is being seen.


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2 solutions

Réponse la plus utile

I had this problem when I upgraded my Mac Mini with an SSD. Mine was also a clean install. But I grabbed everything back over from Time Machine, so my Mac was just like it was before.

Despite everything being "fresh" with a super speedy SSD, some tasks ran unusually slow. The fix that worked for me was verifying and repairing permissions. This can be done through Disk Utility.

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Okay, i'll give it a try. Thanks


Cool. Might not be a 100% fix though.


Don't forget to leave at least 1/3 of the SSD free. And make sure you enable TRIM.


#1 - August - Ok i tried it now , did not work, trim is enabled.

#2 - Dan -1/3 is freesamsung (disk1s2) / : 249.20 GB (168.11 GB free


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What is the linkspeed of your ssd sounds like the bus is set to half speed because of the sata II and sata III will not work well

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@adeheer - Sadly this system has only a SATA II (3.0 GB/s) HD interface. Here is the specs: iMac 27" 3.06 GHz Core 2 Duo (Late 2009) so it would jump down to SATA I (1.5 Gb/s).


I only expect it to run data 2 (200-250mb/s read/write)It was running fast on this ssd for long time.

Link Speed: 3 Gigabit


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Mads sera éternellement reconnaissant.
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