Why does my iMac keep freezing?

Problem description:
21.5 inch Mid 2010 iMac constantly freezes. Problem 1st reported to Apple a couple years ago when computer would freeze, only mouse/pointer would remain active, though clicking did nothing. Now computer works for as little as ½ hour before freezing completely - mouse/keyboard don’t respond, only way out is to hold power button and restart.
Uninstalled Sophos after reading other posts, still freezes.
EtreCheck version: 2.0.4 (89)
Report generated October 17, 2014 at 9:42:58 AM EDT
Hardware Information: ℹ️
iMac (21.5-inch, Mid 2010) (Verified)
iMac - model: iMac11,2
1 3.06 GHz Intel Core i3 CPU: 2-core
4 GB RAM Upgradeable
BANK 0/DIMM0
empty empty empty empty
BANK 1/DIMM0
empty empty empty 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
WXGA TV spdisplays_1080p
System Software: ℹ️
OS X 10.9.5 (13F34) - Uptime: 0:13:55
Disk Information: ℹ️
WDC WD5000AAKS-40V6A0 disk0 : (500.11 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / [Startup]: 499.11 GB (10.00 GB free) (Low!)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
HL-DT-STDVDRW GA32N
USB Information: ℹ️
Apple Inc. iPhone
Burr-Brown from TI               USB Audio CODEC
ALCOR macally
Kensington      Kensington USB/PS2 Orbit
ALCOR macally
Maxtor   OneTouch         1 TB
S.M.A.R.T. Status: Verified
EFI (disk2s1) <not mounted> : 210 MB
Time Machine Backups (disk2s2) /Volumes/Time Machine Backups : 999.86 GB (93.84 GB free)
Initio   INIC-1610P       1 TB
S.M.A.R.T. Status: Verified
EFI (disk1s1) <not mounted> : 210 MB
Untitled (disk1s2) /Volumes/Untitled : 999.86 GB (229.99 GB free)
Apple Internal Memory Card Reader
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Western Digital My Book 1140 2 TB
S.M.A.R.T. Status: Verified
Information (disk3s1) /Volumes/Information : 1 TB (637.56 GB free)
Recall (disk3s2) /Volumes/Recall : 1 TB (338.61 GB free)
Apple Computer, Inc. IR Receiver
Apple Inc. Built-in iSight
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/Library/Application Support/Roxio
[not loaded] com.roxio.TDIXController (2.0) Support
/System/Library/Extensions
[not loaded] com.Cycling74.driver.Soundflower (1.5.1) Support
[not loaded] com.Maxtor.driver.PowSecDriver (4.3.19) Support
[not loaded] com.agfa.driver.AgfaUsbScanner (1.0.0b1) Support
[not loaded] com.cy.iokit.Morpheus (1.4) Support
[not loaded] com.globaldelight.driver.VoilaDevice (1.1 - SDK 10.1) Support
[not loaded] com.hzsystems.driver.CDSDAudioCaptureSupport (1.5) Support
[loaded] com.kensington.trackballworks.driver (1.1.1 - SDK 10.6) Support
[not loaded] com.maxtor.iokit.IOFireWireMxBt (4.2.6) Support
[loaded] com.smithMicro.driver.DeviceSentry (5.1) Support
[loaded] com.smithmicro.DeviceSentryCR (5.1) Support
[not loaded] com.smithmicro.nke.NetBlockade (5.1) Support
[not loaded] com.smithmicro.nke.NetworkSpyAlert (5.1) Support
[not loaded] com.wacom.kext.pentablet (5.3.0 - SDK 10.8) Support
/System/Library/Extensions/DeviceSentry.kext/Contents/PlugIns
[not loaded] com.smithMicro.driver.DeviceSentryBD (5.1) Support
[not loaded] com.smithMicro.driver.DeviceSentryCD (5.1) Support
[loaded] com.smithMicro.driver.DeviceSentryDVD (5.1) Support
Problem System Launch Daemons: ℹ️
[failed] com.apple.ucupdate.plist
Launch Agents: ℹ️
[not loaded] com.google.keystone.agent.plist Support
[not loaded] com.smithmicro.SmithMicroPGGAgent.plist Support
[not loaded] com.wacom.pentablet.plist Support
Launch Daemons: ℹ️
[not loaded] com.adobe.fpsaud.plist Support
[not loaded] com.google.keystone.daemon.plist Support
[not loaded] com.macpaw.CleanMyMac2.Agent.plist Support
[not loaded] com.smithmicro.schedulerdaemon.plist Support
[not loaded] com.trusteer.rooks.rooksd.plist Support
[not loaded] org.sane-project.saned.plist Support
User Launch Agents: ℹ️
[invalid?] com.macpaw.CleanMyMac.trashSizeWatcher.plist Support
[invalid?] com.macpaw.CleanMyMac.volumeWatcher.plist Support
[not loaded] com.macpaw.CleanMyMac2Helper.diskSpaceWatcher.plist Support
[not loaded] com.macpaw.CleanMyMac2Helper.scheduledScan.plist Support
[not loaded] com.macpaw.CleanMyMac2Helper.trashWatcher.plist Support
[not loaded] com.smithmicro.cleaning.schedulermailer.plist Support
User Login Items: ℹ️
VoilaHelper Application (/Applications/Voila.app/Contents/Resources/VoilaHelper.app)
InternetCleanupMenu Application (/Applications/Internet Cleanup/InternetCleanupMenu.app)
Backup Engine ApplicationHidden (/Library/Application Support/Maxtor/Backup Engine.app)
Caffeine Application (/Applications/Caffeine.app)
TrackballWorksHelper Application (/Library/PreferencePanes/TrackballWorks.prefPane/Contents/Resources/TrackballW orksHelper.app)
MacLWSLauncher Application (/Applications/Logitech/LWS/Logitech Webcam Software.app/Contents/MacOS/MacLWSLauncher.app)
Internet Plug-ins: ℹ️
o1dbrowserplugin: Version: 5.4.2.18903 Support
WacomNetscape: Version: 2.1.0-1 - SDK 10.8 Support
Default Browser: Version: 537 - SDK 10.9
Flip4Mac WMV Plugin: Version: 2.4.4.2 Support
WacomTabletPlugin: Version: WacomTabletPlugin 2.1.0.2 Support
Silverlight: Version: 5.1.10411.0 - SDK 10.6 Support
FlashPlayer-10.6: Version: 15.0.0.152 - SDK 10.6 Support
WidevineMediaOptimizer: Version: 6.0.0.12584 - SDK 10.7 Support
Flash Player: Version: 15.0.0.152 - SDK 10.6 Mismatch! Adobe recommends 15.0.0.189
QuickTime Plugin: Version: 7.7.3
googletalkbrowserplugin: Version: 5.4.2.18903 Support
iPhotoPhotocast: Version: 7.0 - SDK 10.8
User Internet Plug-ins: ℹ️
iGetter Plugin: Version: 2.9.2 Support
iGetterScriptablePlugin: Version: 2.9.2 Support
Unity Web Player: Version: UnityPlayer version 2.6.1f3 Support
Safari Extensions: ℹ️
ClickToFlash (Disabled)
iGetter Extension
Turn Off the Lights (Disabled)
3rd Party Preference Panes: ℹ️
PenTablet Support
Flash Player Support
Flip4Mac WMV Support
TrackballWorks Support
Rapport Support
SANE Support
Time Machine: ℹ️
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 499.11 GB Disk used: 489.11 GB
Destinations:
Time Machine Backups [Local]
Total size: 999.86 GB
Total number of backups: 42
Oldest backup: 2014-04-02 10:34:50 +0000
Last backup: 2014-10-17 05:10:37 +0000
Size of backup disk: Too small
Backup size 999.86 GB < (Disk used 489.11 GB X 3)
Top Processes by CPU: ℹ️
      32% backupd
      5% WindowServer
      2% Finder
      2% Activity Monitor
      0% sysmond
Top Processes by Memory: ℹ️
249 MB com.apple.IconServicesAgent
129 MB Dock
116 MB Finder
77 MB WindowServer
60 MB SystemUIServer
Virtual Memory Information: ℹ️
1.21 GB Free RAM
1.84 GB Active RAM
662 MB Inactive RAM
575 MB Wired RAM
298 MB Page-ins
0 B Page-outs

Right. After about 11 hours being on, was on Google+, tried to load events page, got spinning beach ball, clicked again, more spinning beach ball and .... frozen. Activity Monitor usually shows about 90%+ idle.
Coming up on 2 hrs since reboot.

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Console:
8/11/2014 2:00:06.648 am powerd[26]: com.apple.message.domain: com.apple.iokit.wakereasons
com.apple.message.signature: Maintenance
com.apple.message.signature2: unsupported
com.apple.message.signature3: Maintenance
com.apple.message.summarize: YES
SenderMachUUID: 1F97CC0A-F1D6-3A56-BA08-E644AD7CCF82
8/11/2014 2:00:11.046 am UserEventAgent[302]: com.apple.message.domain: com.apple.bluetooth.interval
com.apple.message.power: AC Power
com.apple.message.system: Sleep
com.apple.message.lid: None
com.apple.message.bluetooth: On
com.apple.message.wifi: OFF
com.apple.message.connections: 2
com.apple.message.types: 000000AC
com.apple.message.duration: 360
SenderMachUUID: 58CE43F8-5A2C-39D3-A9A2-94E048245A34
8/11/2014 2:00:11.301 am airportd[29]: com.apple.message.domain: com.apple.wifi.optimized-autojoin
com.apple.message.type: normal
com.apple.message.result: success
com.apple.message.error: no error
com.apple.message.wake_type: dark
com.apple.message.collocated: no
com.apple.message.bluetooth_paging: no
com.apple.message.scanned_channel_count: 33
com.apple.message.retry: no
com.apple.message.preferred_networks_count: 3
com.apple.message.legacy: yes
com.apple.message.association_security_type: wpa2 personal
com.apple.message.scan_duration: 3.7
com.apple.message.gas_duration: 0
com.apple.message.association_duration: 0.3
com.apple.message.duration: 4
SenderMachUUID: 1487FFF4-8AF9-38D4-B8B0-F8EC8D4606D9
8/11/2014 2:01:59.521 am airportd[29]: SCPreferences(com.apple.framework.CoreWLAN:com.apple.airport.preferences.plist) lock held for 6.507 seconds
com.apple.message.domain: com.apple.SystemConfiguration.SCPreferencesUnlock
com.apple.message.signature: com.apple.framework.CoreWLAN
com.apple.message.signature2: com.apple.airport.preferences.plist
com.apple.message.value: 6.507
SenderMachUUID: 1487FFF4-8AF9-38D4-B8B0-F8EC8D4606D9
8/11/2014 2:01:59.663 am powerd[26]: com.apple.message.domain: com.apple.iokit.wakereasons
com.apple.message.signature: Maintenance
com.apple.message.signature2: unsupported
com.apple.message.signature3: Maintenance
com.apple.message.summarize: YES
SenderMachUUID: 1F97CC0A-F1D6-3A56-BA08-E644AD7CCF82
8/11/2014 2:02:03.546 am CalendarAgent[348]: com.apple.message.domain: com.apple.calendar.account_refresh_2
com.apple.message.result: fail
com.apple.message.signature: NSURLErrorDomain:-1009
com.apple.message.signature2: com.apple.account.icloud
com.apple.message.summarize: YES
SenderMachUUID: B4A6E7BD-880A-3F93-A04D-0C40E8689AC8
8/11/2014 2:02:03.694 am airportd[29]: com.apple.message.domain: com.apple.wifi.optimized-autojoin
com.apple.message.type: normal
com.apple.message.result: success
com.apple.message.error: no error
com.apple.message.wake_type: user
com.apple.message.collocated: no
com.apple.message.bluetooth_paging: no
com.apple.message.scanned_channel_count: 33
com.apple.message.retry: no
com.apple.message.preferred_networks_count: 3
com.apple.message.legacy: yes
com.apple.message.association_security_type: wpa2 personal
com.apple.message.scan_duration: 3.7
com.apple.message.gas_duration: 0
com.apple.message.association_duration: 0.44
com.apple.message.duration: 4.2
SenderMachUUID: 1487FFF4-8AF9-38D4-B8B0-F8EC8D4606D9
8/11/2014 2:03:53.508 am airportd[29]: SCPreferences(com.apple.framework.CoreWLAN:com.apple.airport.preferences.plist) lock held for 6.496 seconds
com.apple.message.domain: com.apple.SystemConfiguration.SCPreferencesUnlock
com.apple.message.signature: com.apple.framework.CoreWLAN
com.apple.message.signature2: com.apple.airport.preferences.plist
com.apple.message.value: 6.496
SenderMachUUID: 1487FFF4-8AF9-38D4-B8B0-F8EC8D4606D9
8/11/2014 2:03:53.644 am powerd[26]: com.apple.message.domain: com.apple.iokit.wakereasons
com.apple.message.signature: Maintenance
com.apple.message.signature2: unsupported
com.apple.message.signature3: Maintenance
com.apple.message.summarize: YES
SenderMachUUID: 1F97CC0A-F1D6-3A56-BA08-E644AD7CCF82
8/11/2014 2:03:57.492 am airportd[29]: com.apple.message.domain: com.apple.wifi.optimized-autojoin
com.apple.message.type: normal
com.apple.message.result: success
com.apple.message.error: no error
com.apple.message.wake_type: user
com.apple.message.collocated: no
com.apple.message.bluetooth_paging: no
com.apple.message.scanned_channel_count: 33
com.apple.message.retry: no
com.apple.message.preferred_networks_count: 3
com.apple.message.legacy: yes
com.apple.message.association_security_type: wpa2 personal
com.apple.message.scan_duration: 3.7
com.apple.message.gas_duration: 0
com.apple.message.association_duration: 0.25
com.apple.message.duration: 4
SenderMachUUID: 1487FFF4-8AF9-38D4-B8B0-F8EC8D4606D9
8/11/2014 2:05:46.523 am airportd[29]: SCPreferences(com.apple.framework.CoreWLAN:com.apple.airport.preferences.plist) lock held for 6.511 seconds
com.apple.message.domain: com.apple.SystemConfiguration.SCPreferencesUnlock
com.apple.message.signature: com.apple.framework.CoreWLAN
com.apple.message.signature2: com.apple.airport.preferences.plist
com.apple.message.value: 6.511
SenderMachUUID: 1487FFF4-8AF9-38D4-B8B0-F8EC8D4606D9
Terminal:
Nov 7 04:26:54 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 7 04:28:47 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 7 04:30:40 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 7 06:19:31 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 7 08:08:22 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 7 08:51:06 BiMac-13 kernel[0] <Notice>: Wake reason: EHC1
Nov 8 02:00:00 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:01:53 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:03:47 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:05:40 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:07:33 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:09:28 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:11:21 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:13:14 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:15:07 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:17:00 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:18:53 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:20:46 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:22:39 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:24:34 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:26:27 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:28:22 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:30:14 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:32:07 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:34:00 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:35:53 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:37:46 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:39:39 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:41:32 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:43:25 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:45:18 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:47:11 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:49:04 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:50:57 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:52:50 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:54:43 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:56:36 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 02:58:29 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:00:22 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:02:15 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:04:08 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:06:01 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:07:54 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:09:47 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:11:40 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:13:33 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:15:26 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:17:19 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:19:12 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:21:05 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:22:58 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:24:51 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:27:52 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)
Nov 8 03:29:45 BiMac-13 kernel[0] <Notice>: Wake reason: RTC (Alarm)

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.
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Or you can use your Apple ID to register with this site and go the Apple BugReporter. Supposedly you will get an answer if you submit feedback.
Feedback via Apple Developer

Why does my safari keep freezing on my macbook pro.

I purchased the 13-inch Macbook Pro in 2011. I have OS X 10.7.5. My Safari keeps freezing. Could someone please give me some advise on how to fix this.
Thanks

What exactly happens when it freezes, and how do you recover?

Why does yahoo mail keep freezing?

I am using Safari and yahoo mail, I can browse ok but when I try and check my emails yahoo mail keeps freezing on me?

did you get this figured out?

HT1338 why does my imac keep making a noise every 30 seconds when I am not using it?

My iMac keeping making a sound (sort of a clicking sound) every 30 seconds when I am not using it. It is very annoying; is therre a way to stop it?

Bring it in to service, and ask them to tell you what the noise is. Sometimes it just is the optical drive realigning itself. It could be the sign of a dying hard drive. Only they can tell the difference.

Why does my Macbook keep freezing?

I have a mid-2012 13" non-retina display Macbook Pro that I got this year in September, and the past few days I've been experiencing issues with it. It keeps freezing and will not respond at all unless I hold in the power button. I bought it standard but I upgraded the RAM from 4GB to 8GB last month. It was able to run all the same programs at once even with 4GB. I did happen to drop it about 3ft a few days ago. It landed on the top right corner, where the power button is located and the casing did take some damage. The case is dented in a little where it landed, it somewhat dislocated the allignment of the screen with the body when it's closed, and a dent popped just below the power button but it still works perfectly fine. It is running Mavericks and I know some of my friends who have Mac experience some issues with Mavericks. And last night when it froze, I held in the power button to shut it down as it would not respond at all and when I turned it on and the Apple logo appeared, these huge, black bars appeared on my screen in random spots for abot 3 seconds and then went away. It never started up until I shut it down yet again and it started back up normally as if nothing happened. The RAM upgrade I bought wan't from Apple either. I got it from another company called Crucial Memory, and I did order a RAM upgrade for my last laptop from there before I got rid of it. And if I replaced the ATA drive in my Mac with an SSD, would it speed up?

If you bought it within 90 days, trained operators are standing by at Apple Support to receive your call, listen to your complaints, and make specific suggestions to address your concerns, and it is FREE, included with your purchase.

Why does my iMac keep freezing?

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