Having the same issue. Very slow computer following the May 16th upgrade. Here is what my profile says:
EtreCheck version: 2.9.12 (265)
Report generated 2016-05-27 18:19:27
Download EtreCheck from https://etrecheck.com
Runtime 5:49
Performance: Below Average
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Problem: Computer is too slow
Hardware Information: ⓘ
iMac (24-inch, Mid 2007)
[Technical Specifications] - [User Guide] - [Warranty & Service]
iMac - model: iMac7,1
1 2.8 GHz Intel Core 2 Duo CPU: 2-core
4 GB RAM Upgradeable - [Instructions]
BANK 0/DIMM0
2 GB DDR2 SDRAM 667 MHz ok
BANK 1/DIMM1
2 GB DDR2 SDRAM 667 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ⓘ
ATI,RadeonHD2600 - VRAM: 256 MB
iMac 1920 x 1200
VX2453 Series 1920 x 1080
System Software: ⓘ
OS X Yosemite 10.10.5 (14F1808) - Time since boot: about 11 hours
Disk Information: ⓘ
WDC WD20EARS-00MVWB0 disk0 : (2 TB) (Rotational)
EFI (disk0s1) <not mounted> : 210 MB
iMac HD (disk0s2) / : 2.00 TB (406.27 GB free) - 347 errors
Drive failure!
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information: ⓘ
Apple Inc. Built-in iSight
Apple Inc. iPad
GenesysLogic USB2.0 Hub
Seagate Backup+ Desk 2 TB
EFI (disk2s1) <not mounted> : 210 MB
Time Machine (disk2s2) /Volumes/Time Machine : 2.00 TB (78.43 GB free)
GenesysLogic USB2.0 Hub
Fitbit Inc. Fitbit Base Station
Iomega USB to ATA/ATAPI bridge 1 TB
EFI (disk1s1) <not mounted> : 210 MB
FLAC (disk1s2) /Volumes/FLAC : 999.86 GB (255.75 GB free)
Apple Computer, Inc. IR Receiver
Apple Inc. Bluetooth USB Host Controller
Gatekeeper: ⓘ
Mac App Store and identified developers
Kernel Extensions: ⓘ
/Applications/Toast 10 Titanium/Toast Titanium.app
[not loaded] com.roxio.BluRaySupport (1.1.6 - 2016-05-16) [Support]
/Library/Extensions
[not loaded] com.blackmagic-design.desktopvideo.iokit.driver (10.6.1 - SDK 10.9 - 2016-05-18) [Support]
[not loaded] com.blackmagic-design.desktopvideo.iokit.framebufferdriver (10.6.1 - SDK 10.9 - 2016-05-18) [Support]
[not loaded] com.blackmagic-design.desktopvideo.multibridge.iokit.driver (10.6.1 - SDK 10.9 - 2016-05-18) [Support]
[not loaded] com.blackmagic-design.driver.BlackmagicIO (10.6.1 - SDK 10.9 - 2016-05-18) [Support]
[not loaded] com.blackmagic-design.driver.BlackmagicUsbIO (10.6.1 - SDK 10.9 - 2016-05-18) [Support]
/Library/Extensions/DeckLink_Driver.kext/Contents/PlugIns
[not loaded] com.blackmagic-design.desktopvideo.firmware (10.6.1 - SDK 10.9 - 2016-02-28) [Support]
/System/Library/Extensions
[not loaded] com.avid.driver.Avid_SCSI (1.2.0 - 2016-05-17) [Support]
[not loaded] com.avid.driver.Avid_SCSI_RBC (1.2.0 - 2016-05-17) [Support]
[not loaded] com.digidesign.fwfamily.driver (7.4.2 - 2016-05-17) [Support]
[not loaded] com.digidesign.iokit.DigiDal (8.0.0 - 2016-05-17) [Support]
[not loaded] com.digidesign.iokit.DigiIO (8.0.0 - 2016-05-17) [Support]
[not loaded] com.digidesign.mbox2.boot.driver (8.0.0 - 2016-05-17) [Support]
[not loaded] com.digidesign.mbox2.driver (8.0.0 - 2016-05-17) [Support]
[not loaded] com.paceap.kext.pacesupport.master (5.7 - 2016-05-17) [Support]
[not loaded] com.pctools.iantivirus.kfs (1.0.1 - 2016-05-17) [Support]
[not loaded] com.seagate.driver.PowSecDriverCore (5.1.1 (26465) - 2016-05-17) [Support]
/System/Library/Extensions/PACESupportFamily.kext/Contents/PlugIns
[not loaded] com.paceap.kext.pacesupport.leopard (5.7 - 2009-03-21) [Support]
[not loaded] com.paceap.kext.pacesupport.panther (5.7 - 2009-03-21) [Support]
[not loaded] com.paceap.kext.pacesupport.snowleopard (5.7 - 2009-03-21) [Support]
[not loaded] com.paceap.kext.pacesupport.tiger (5.7 - 2009-03-21) [Support]
/System/Library/Extensions/Seagate Storage Driver.kext/Contents/PlugIns
[not loaded] com.seagate.driver.PowSecLeafDriver_10_4 (5.1.1 (26465) - 2011-07-22) [Support]
[not loaded] com.seagate.driver.PowSecLeafDriver_10_5 (5.1.1 (26465) - 2011-07-22) [Support]
[not loaded] com.seagate.driver.SeagateDriveIcons (5.1.1 (26465) - 2011-07-22) [Support]
~/Library/Services/ToastIt.service/Contents/MacOS
[not loaded] com.roxio.TDIXController (2.0 - 2012-06-27) [Support]
Startup Items: ⓘ
Digidesign Mbox 2: Path: /Library/StartupItems/Digidesign Mbox 2
PACESupport: Path: /Library/StartupItems/PACESupport
Qmaster: Path: /Library/StartupItems/Qmaster
Startup items are obsolete in OS X Yosemite
System Launch Agents: ⓘ
[not loaded] 5 Apple tasks
[loaded] 147 Apple tasks
[running] 60 Apple tasks
System Launch Daemons: ⓘ
[not loaded] 46 Apple tasks
[loaded] 137 Apple tasks
[running] 80 Apple tasks
Launch Agents: ⓘ
[running] com.blackmagic-design.DesktopVideoFirmwareUpdater.plist (2016-02-28) [Support]
[running] com.dell.scan.Dell2155ColorMFP.ButtonListenerAgent.plist (2011-09-13) [Support]
[loaded] com.google.keystone.agent.plist (2016-03-02) [Support]
[running] com.seagate.SeagateStorageGauge.plist (2010-03-10) [Support]
Launch Daemons: ⓘ
[failed] PACESupport.plist (2009-03-21) [Support]
[loaded] com.adobe.fpsaud.plist (2016-05-09) [Support]
[running] com.blackmagic-design.DesktopVideoHelper.plist (2016-02-28) [Support]
[loaded] com.blackmagic-design.desktopvideo.XPCService.plist (2016-02-28) [Support]
[running] com.blackmagic-design.streaming.BMDStreamingServer.plist (2016-02-28) [Support]
[running] com.digidesign.fwfamily.helper.plist (2009-01-05) [Support]
[loaded] com.google.keystone.daemon.plist (2016-03-02) [Support]
[loaded] com.klieme.TimeMachineScheduler.plist (2014-01-09) [Support]
[loaded] com.macpaw.CleanMyMac3.Agent.plist (2016-05-16) [Support]
User Launch Agents: ⓘ
[running] com.amazon.music.plist (2016-05-26) [Support]
[not loaded] com.macpaw.CleanMyMac3.Scheduler.plist (2016-05-27) [Support]
[running] com.memeo.Memeod.plist (2011-07-22) [Support]
User Login Items: ⓘ
Music Manager Application Hidden (~/Library/PreferencePanes/MusicManager.prefPane/Contents/Helpers/MusicManagerH elper.app)
Garmin Express Service Application (/Applications/Garmin Express.app/Contents/Library/LoginItems/Garmin Express Service.app)
iAntiVirus Application Hidden (/Applications/iAntiVirus/iAntiVirus.app)
Other Apps: ⓘ
[running] com.garmin.renu.service.102840
[running] com.google.Chrome.124140
[running] com.google.musicmanager.105680
[running] com.pctools.iAntiVirus.123288
[running] jp.co.canon.cijscannerregister.105396
[loaded] 368 Apple tasks
[running] 172 Apple tasks
Internet Plug-ins: ⓘ
AmazonMP3DownloaderPlugin1017277: AmazonMP3DownloaderPlugin 1.0.17 (2012-10-02) [Support]
Default Browser: 600 - SDK 10.10 (2016-05-17)
Flip4Mac WMV Plugin: 2.3.0.14 (2009-09-28) [Support]
AmazonMP3DownloaderPlugin1017265: AmazonMP3DownloaderPlugin 1.0.17 (2012-08-01) [Support]
AdobePDFViewerNPAPI: 11.0.04 - SDK 10.6 (2016-05-17) [Support]
DivXBrowserPlugin: 1.4 (2008-03-26) [Support]
FlashPlayer-10.6: 21.0.0.242 - SDK 10.6 (2016-05-17) [Support]
Silverlight: 3.0.40818.0 (2016-05-17) [Support]
QuickTime Plugin: 7.7.3 (2016-05-16)
AmazonMP3DownloaderPlugin: AmazonMP3DownloaderPlugin 1.0.17 (2012-02-15) [Support]
Flash Player: 21.0.0.242 - SDK 10.6 (2016-05-17) [Support]
iPhotoPhotocast: 7.0 (2008-11-01)
AdobePDFViewer: 11.0.04 - SDK 10.6 (2016-05-17) [Support]
JavaAppletPlugin: 15.0.0 - SDK 10.10 (2015-08-10) Check version
User internet Plug-ins: ⓘ
NugsterPlugin: Unknown - SDK 10.7 (2015-06-04) [Support]
Picasa: 1.0 - SDK 10.6 (2015-02-13) [Support]
Safari Extensions: ⓘ
iTube Studio - iSkysoft Studio - http://www.iskysoft.com (2013-01-06)
Audio Plug-ins: ⓘ
DVCPROHDAudio: 1.3 (2007-04-20)
3rd Party Preference Panes: ⓘ
Blackmagic Desktop Video (2016-02-28) [Support]
Dell 2155 Color MFP (2016-05-17) [Support]
DigidesignMbox2 (2016-05-17) [Support]
Digidesign Mbox 2 Pro (2016-05-17) [Support]
DivX (2008-03-26) [Support]
Flash Player (2016-05-09) [Support]
Flip4Mac WMV (2009-09-28) [Support]
MacFUSE (2008-12-19) [Support]
MusicManager (2016-05-17) [Support]
TimeMachineScheduler (2016-05-17) [Support]
Time Machine: ⓘ
Skip System Files: NO
Auto backup: YES
Volumes being backed up:
iMac HD: Disk size: 2.00 TB Disk used: 1.59 TB
Destinations:
Time Machine [Local]
Total size: 2.00 TB
Total number of backups: 15
Oldest backup: 5/22/16, 7:54 AM
Last backup: 5/27/16, 6:09 PM
Size of backup disk: Too small
Backup size 2.00 TB < (Disk used 1.59 TB X 3)
Top Processes by CPU: ⓘ
4% Google Chrome Helper(10)
3% WindowServer
2% fontd
0% kernel_task
0% mds_stores
Top Processes by Memory: ⓘ
1.60 GB Google Chrome Helper(10)
445 MB kernel_task
205 MB Google Chrome
82 MB Finder
78 MB mdworker(7)
Virtual Memory Information: ⓘ
63 MB Free RAM
3.94 GB Used RAM (1.02 GB Cached)
13 MB Swap Used
Diagnostics Information: ⓘ
May 27, 2016, 05:02:33 PM ~/Library/Logs/DiagnosticReports/PonoMusic World 20_2016-05-27-170233_[redacted].crash
com.jriver.PonoMusic20 - /Applications/PonoMusic World 20.app/Contents/MacOS/PonoMusic World 20
May 27, 2016, 04:21:14 PM ~/Library/Logs/DiagnosticReports/PonoMusic World 20_2016-05-27-162114_[redacted].crash
May 27, 2016, 01:17:15 PM /Library/Logs/DiagnosticReports/PonoMusic World 20_2016-05-27-131715_[redacted].hang
May 27, 2016, 12:10:40 PM /Library/Logs/DiagnosticReports/PonoMusic World 20_2016-05-27-121040_[redacted].hang
May 27, 2016, 10:16:21 AM /Library/Logs/DiagnosticReports/PonoMusic World 20_2016-05-27-101621_[redacted].hang
May 27, 2016, 07:03:55 AM Self test - passed
May 26, 2016, 06:23:56 PM ~/Library/Logs/DiagnosticReports/PonoMusic World 20_2016-05-26-182356_[redacted].crash