Having read numerous posts about this I ended up taking my Late 2011 MBP to Apple genius bar. They ran a test and discovered there was a software issue that was causing my MBP to run slow, and frustratingly it was intermittent, but too annoying.
They ended up scrubbing the hard drive and reinstalling Yosemite and it is like I HAVE A NEW COMPUTER!
Unfortunately I did not do a great job of backing up and alas I lost some home movie files which I thought were kept in iTunes. Key lessons learned.
1. If you have a problem go to Apple
2. Make sure you back up everything.
3. The guy at Apple reckons Clean My Mac might have cause the problem. (Who knows) But I am know reluctant to use it again.
My MacBook Pro is running very slow.
EtreCheck version: 2.2 (132)
Report generated 5/6/15, 9:40 PM
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.
MacBook Pro (15-inch, Mid 2009) (Verified)
MacBook Pro - model: MacBookPro5,3
1 2.66 GHz Intel Core 2 Duo CPU: 2-core
8 GB RAM Upgradeable
4 GB DDR3 1333 MHz ok
4 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Battery: Health = Normal - Cycle count = 63 - SN = W05024HXDBWZA
NVIDIA GeForce 9400M - VRAM: 256 MB
NVIDIA GeForce 9600M GT - VRAM: 256 MB
Color LCD 1440 x 900
OS X 10.10.3 (14D136) - Time since boot: 3:9:20
Hitachi HTS545032B9SA02 disk0 : (320.07 GB)
EFI (disk0s1) <not mounted> : 210 MB
Macbook Pro (disk0s2) / : 319.08 GB (53.55 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Apple Internal Memory Card Reader
Apple Inc. Built-in iSight
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Computer, Inc. IR Receiver
Mac App Store and identified developers
/Applications/TechTool Pro 8.app
[not loaded] com.micromat.driver.spdKernel (1 - SDK 10.10) [Click for support]
[not loaded] com.micromat.driver.spdKernel-10-8 (1 - SDK 10.10) [Click for support]
[not loaded] com.micromat.driver.SPDKernel (1 - SDK 10.8) [Click for support]
HWNetMgr: Path: /Library/StartupItems/HWNetMgr
HWPortDetect: Path: /Library/StartupItems/HWPortDetect
StartOuc: Path: /Library/StartupItems/StartOuc
Startup items are obsolete in OS X Yosemite
[not loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]
[running] com.adobe.AdobeCreativeCloud.plist [Click for support]
[running] com.micromat.CheckmateAgent.plist [Click for support]
[running] com.micromat.TechToolProAgent.plist [Click for support]
[loaded] com.oracle.java.Java-Updater.plist [Click for support]
[running] com.adobe.adobeupdatedaemon.plist [Click for support]
[loaded] com.adobe.fpsaud.plist [Click for support]
[running] com.micromat.CheckmateIdleDaemon.plist [Click for support]
[loaded] com.micromat.CheckmateWorkerDaemon.plist [Click for support]
[running] com.micromat.TechToolProDaemon.plist [Click for support]
[loaded] com.microsoft.office.licensing.helper.plist [Click for support]
[loaded] com.oracle.java.Helper-Tool.plist [Click for support]
[loaded] com.oracle.java.JavaUpdateHelper.plist [Click for support]
[loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]
[loaded] com.adobe.ARM.[...].plist [Click for support]
[failed] com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist [Click for details]
[loaded] com.bittorrent.BitTorrent.plist [Click for support]
[loaded] com.google.keystone.agent.plist [Click for support]
[running] com.spotify.webhelper.plist [Click for support]
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
MagicMenu Application (/Applications/StuffIt Archive Manager.app/Contents/MacOS/MagicMenu.app)
Google Drive Application (/Applications/Google Drive.app)
AdobeResourceSynchronizer Application (/Applications/Adobe/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
Dropbox Application (/Applications/Dropbox.app)
Google Chrome Application Hidden (/Applications/Google Chrome.app)
EvernoteHelper Application (/Applications/Evernote.app/Contents/Library/LoginItems/EvernoteHelper.app)
RealPlayer Downloader Agent Application (/Users/[redacted]/Library/Application Support/RealNetworks/RealPlayer Downloader Agent.app)
Garmin Express Service Application (/Applications/Garmin Express.app/Contents/Library/LoginItems/Garmin Express Service.app)
JavaAppletPlugin: Version: Java 8 Update 40 Check version
FlashPlayer-10.6: Version: 220.127.116.11 - SDK 10.6 [Click for support]
AdobeAAMDetect: Version: 18.104.22.168 - SDK 10.9 [Click for support]
Flash Player: Version: 22.214.171.124 - SDK 10.6 [Click for support]
Default Browser: Version: 600 - SDK 10.10
QuickTime Plugin: Version: 7.7.3
SharePointBrowserPlugin: Version: 14.4.9 - SDK 10.6 [Click for support]
GarminGpsControl: Version: 126.96.36.199 - SDK 10.8 [Click for support]
Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
iPhotoPhotocast: Version: 7.0 - SDK 10.8
RealPlayer Plugin: Version: Unknown [Click for support]
Google Earth Web Plug-in: Version: 7.1 [Click for support]
Flash Player [Click for support]
Java [Click for support]
TechTool Protection [Click for support]
Skip System Files: NO
Mobile backups: ON
Auto backup: YES
Volumes being backed up:
Macbook Pro: Disk size: 319.08 GB Disk used: 265.52 GB
Rat Drive [Local]
Total size: 249.72 GB
Total number of backups: 4
Oldest backup: 2014-11-12 00:25:11 +0000
Last backup: 2015-01-08 09:48:54 +0000
Size of backup disk: Too small
Backup size 249.72 GB < (Disk used 265.52 GB X 3)
6% Google Chrome Helper(13)
4% Google Chrome
2% RealPlayer Downloader Agent
1.52 GB Google Chrome Helper(13)
723 MB kernel_task
442 MB softwareupdated
188 MB Google Chrome
139 MB mtmd
1.24 GB Free RAM
6.76 GB Used RAM
0 B Swap Used
May 6, 2015, 08:33:36 PM /Library/Logs/DiagnosticReports/mtmd_2015-05-06-203336_[redacted].cpu_resource. diag [Click for details]
May 6, 2015, 06:25:14 PM Self test - passed
May 6, 2015, 06:23:47 PM /Library/Logs/DiagnosticReports/EvernoteHelper_2015-05-06-182347_[redacted].cra sh
May 5, 2015, 02:54:50 PM /Library/Logs/DiagnosticReports/firefox_2015-05-05-145450_[redacted].cpu_resour ce.diag [Click for details]
May 5, 2015, 11:51:54 AM /Library/Logs/DiagnosticReports/discoveryd_2015-05-05-115154_[redacted].crash
May 4, 2015, 04:42:23 PM /Library/Logs/DiagnosticReports/discoveryd_2015-05-04-164223_[redacted].crash
This is not really an answer but i can assure you that the Internet is slow because of Yosemite. I have complained on numerous occasions to no avail and I'm constantly disconnecting from the Network and then connecting again to get some sort of life in my internet. Also, my two daughters have standard windows computers, play minecraft, surf the internet etc and have absolutely no internet problems whatsoever, so yes, this to me says its my operating system. Plus before Yosemite it was fine. At the moment i would not buy another Macbook because of this which is a shame because i love my Apple products. Im just hoping with the next instalment of a operating system update, september i think, all will be solved.
Sorry again, i wish i had an answer but Apple are clearly not going to do anything about it now.
I have a Macbook Pro that runs OS X 10.9.5. I have read tons of posts regarding Mac's that are slowing down and was having tons of similar issues, mostly internet related, and I have high speed 30Mbps coming in. From iTunes always taking forever to connect to url while trying to sample songs to Safari working fast one minute then stalling out the next. I put together the steps some others have posted and it was a COMPLETE SUCCESS. iTunes and Safari are flying with absolutely no stalling. Apparently tons of people have no idea that the default DNS addresses stored in their network settings are bogged down addresses that cause all these problems. I am not even close to being a computer wizard, but here are the steps I took (I wrote this so even a 3rd grader could understand):
1) Download 'namebench' for Mac (a program that finds the fastest possible DNS locations for your computer)
-after downloading, a screen comes up showing your current DNS addresses and automatically has a 'check' in the box to search for DNS servers. Then click 'start' at the bottom right
-after a few minutes of scanning it will return a report/webpage that lists the top 3 DNS connections for your computer (located at the top right of the report). Keep this webpage up or minimize it while you do the next steps.
2) Click your apple icon at the top left of your screen, then click 'System Preferences'
3) Find and click the 'Network' icon
4) If you connect by Wi-Fi, it will likely already be selected, in which case click the 'Advanced' button at the bottom right.
5) Click the 'DNS' tab at the top, and on the left where it lists your DNS servers, go to the bottom and click the '+' button. This should automatically erase the 3 listed in the box and allow you to type in new ones.
6) Go back to the Namebench report and type in each address starting with the top address in the report (After you enter the first address click the '+' again to add the second, and '+' one last time to add the third.
7) Click 'OK' at the bottom right, that screen will close and bring you back to connection screen, at the bottom right click 'apply.'
8) After this, close any programs that run off the internet and simply start them back up. They should be flying.
Hope this helps the many of you out there that have problems with your Mac slowing down and thanks to all the contributions of information that led to figuring this problem out.