Hello rkaufmann87, thank you for your quick reply. Below please find my EtreCheck results.
Problem description:
iMac since 1 week very slow, get very hot at the top of the screen, usage very often interrupted with the coloured wheel pausing any activity.
EtreCheck version: 2.2 (132)
Report generated 6/29/15, 8:27 PM
Download EtreCheck from http://etresoft.com/etrecheck
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Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
iMac (21.5-inch, Mid 2010) (Technical Specifications)
iMac - model: iMac11,2
1 3.06 GHz Intel Core i3 CPU: 2-core
4 GB RAM Upgradeable
BANK 0/DIMM0
Empty
BANK 1/DIMM0
Empty
BANK 0/DIMM1
2 GB DDR3 1333 MHz ok
BANK 1/DIMM1
2 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
ATI Radeon HD 4670 - VRAM: 256 MB
iMac 1920 x 1080
System Software: ℹ️
OS X 10.10.3 (14D136) - Time since boot: one day 5:2:56
Disk Information: ℹ️
ST3500418AS disk0 : (500.11 GB)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / : 499.25 GB (342.50 GB free) - 609 errors
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
HL-DT-STDVDRW GA32N
USB Information: ℹ️
Brother DCP-J4110DW
Apple Internal Memory Card Reader
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
TOSHIBA External USB 3.0 2 TB
EFI (disk1s1) <not mounted> : 210 MB
iMAC Backup Toshiba EXT (disk1s2) /Volumes/iMAC Backup Toshiba EXT : 2.00 TB (734.78 GB free)
Apple Inc. Built-in iSight
Apple Computer, Inc. IR Receiver
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/Library/Extensions
[not loaded] com.BlackBerry.driver.USBCDCNCM (1.0.14 - SDK 10.7) [Click for support]
[loaded] com.rim.driver.BlackBerryUSBDriverInt (2.2.16 - SDK 10.7) [Click for support]
[loaded] com.rim.driver.BlackBerryVirtualPrivateNetwork (1.0.18 - SDK 10.8) [Click for support]
/System/Library/Extensions
[not loaded] com.bose.bluetooth (1.0.0) [Click for support]
Launch Agents: ℹ️
[running] com.brother.LOGINserver.plist [Click for support]
[running] com.rim.BBLaunchAgent.plist [Click for support]
[running] com.rim.blackberrylink.BlackBerry-Link-Helper-Agent.plist [Click for support]
[running] com.rim.PeerManager.plist [Click for support]
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist [Click for support]
[loaded] com.microsoft.office.licensing.helper.plist [Click for support]
[running] com.rim.BBDaemon.plist [Click for support]
[not loaded] com.rim.nkehelper.plist [Click for support]
[running] com.rim.tunmgr.plist [Click for support]
User Login Items: ℹ️
Skype Application (/Applications/Skype.app)
N067U_ButtonManager application (/Library/CFMSupport/N067U_ButtonManager.app)
N124U_ButtonManager application (/Library/CFMSupport/N124U_ButtonManager.app)
BlackBerry Link Application (/Applications/BlackBerry Link.app)
LOGINserver Application (/Library/Printers/Brother/Utilities/Server/LOGINserver.app)
InstUtilLaunch Application (/Library/Printers/Brother/Utilities/InstallUtility.app/Contents/Resources/Inst UtilLaunch.app)
BlackBerry Device Manager Application Hidden (/Library/Application Support/BlackBerry/BlackBerry Device Manager.app)
Internet Plug-ins: ℹ️
Flip4Mac WMV Plugin: Version: 2.4.4.2 [Click for support]
FlashPlayer-10.6: Version: 18.0.0.194 - SDK 10.6 [Click for support]
iPhotoPhotocast: Version: 7.0
Flash Player: Version: 18.0.0.194 - SDK 10.6 [Click for support]
CANONiMAGEGATEWAYDL: Version: 3.1.0.2 [Click for support]
Default Browser: Version: 600 - SDK 10.10
QuickTime Plugin: Version: 7.7.3
SharePointBrowserPlugin: Version: 14.5.2 - SDK 10.6 [Click for support]
Silverlight: Version: 5.1.40416.0 - SDK 10.6 [Click for support]
JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
Safari Extensions: ℹ️
AllPagesZoom
HoverSee
eWallet AutoPass
AlterVideo
Save to Pocket
Translate
Awesome Screenshot
3rd Party Preference Panes: ℹ️
Flash Player [Click for support]
Flip4Mac WMV [Click for support]
Time Machine: ℹ️
Skip System Files: NO
Mobile backups: OFF
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 499.25 GB Disk used: 156.74 GB
Destinations:
iMAC Backup Toshiba EXT [Local]
Total size: 2.00 TB
Total number of backups: 78
Oldest backup: 2014-12-11 01:46:15 +0000
Last backup: 2015-06-29 18:26:18 +0000
Size of backup disk: Excellent
Backup size 2.00 TB > (Disk size 499.25 GB X 3)
Top Processes by CPU: ℹ️
5% sysmond
3% WindowServer
1% fontd
1% Activity Monitor
0% taskgated
Top Processes by Memory: ℹ️
459 MB kernel_task
459 MB softwareupdated
414 MB com.apple.WebKit.WebContent(4)
168 MB cfprefsd(2)
168 MB Finder
Virtual Memory Information: ℹ️
59 MB Free RAM
3.94 GB Used RAM
256 KB Swap Used
Diagnostics Information: ℹ️
Jun 28, 2015, 03:21:25 PM /Users/[redacted]/Library/Logs/DiagnosticReports/BlackBerry Device Manager_2015-06-28-152125_[redacted].crash
Jun 28, 2015, 03:20:17 PM Self test - passed
Jun 28, 2015, 10:22:12 AM /Users/[redacted]/Library/Logs/DiagnosticReports/BlackBerry Device Manager_2015-06-28-102212_[redacted].crash
Jun 27, 2015, 09:20:55 PM /Users/[redacted]/Library/Logs/DiagnosticReports/BlackBerry Device Manager_2015-06-27-212055_[redacted].crash
Jun 27, 2015, 07:18:17 AM /Users/[redacted]/Library/Logs/DiagnosticReports/BlackBerry Device Manager_2015-06-27-071817_[redacted].crash