My iMac stops responding... its' literally freezes....

Question

and can't move a thing... the screen is still on. no kernel panic or anything... even checked the diagnostic logs... shows nothing... last one I had was 3 weeks ago... but I recently experienced this a couple of times.
some sites recommend check memory and SMART check for the hard... did all that (using techpro) no issues found... what is wrong with my dear imac? This is the latest imac (late 2012), 27 inch and OS is ML.
appreciate any advice.
thanks
Y

Answer 1

6/18/13 12:55:19.928 PM GoogleSoftwareUpdateDaemon[2717]: -[KSUpdateCheckAction(PrivateMethods) finishAction] KSUpdateCheckAction found updates: {( )}
6/18/13 12:55:19.931 PM GoogleSoftwareUpdateDaemon[2717]: -[KSPrefetchAction performAction] KSPrefetchAction no updates to prefetch.
6/18/13 12:55:19.932 PM GoogleSoftwareUpdateDaemon[2717]: -[KSMultiUpdateAction performAction] KSSilentUpdateAction had no updates to apply.
6/18/13 12:55:19.932 PM GoogleSoftwareUpdateDaemon[2717]: -[KSMultiUpdateAction performAction] KSPromptAction had no updates to apply.
6/18/13 12:55:19.934 PM GoogleSoftwareUpdateDaemon[2717]: -[KSUpdateEngine(PrivateMethods) updateFinish] KSUpdateEngine update processing complete.
6/18/13 12:55:20.641 PM GoogleSoftwareUpdateDaemon[2717]: -[KSUpdateEngine updateAllProducts] KSUpdateEngine updating all installed products.
6/18/13 12:55:20.643 PM GoogleSoftwareUpdateDaemon[2717]: -[KSCheckAction performAction] KSCheckAction checking 3 ticket(s).
6/18/13 12:55:20.646 PM GoogleSoftwareUpdateDaemon[2717]: -[KSCheckAction performAction] KSCheckAction ignored these tickets for products that were not installed: {(
          <KSTicket:0x2272460
                    productID=com.google.Chrome
                    version=27.0.1453.110
                    xc=<KSPathExistenceChecker:0x2275ec0 path=/Applications/Google Chrome.app>
                    serverType=Omaha
                    url=https://tools.google.com/service/update2
                    creationDate=2011-03-26 00:33:09
                    tagPath=/Applications/Google Chrome.app/Contents/Info.plist
                    tagKey=KSChannelID
                    brandPath=/Library/Google/Google Chrome Brand.plist
                    brandKey=KSBrandID
                    versionPath=/Applications/Google Chrome.app/Contents/Info.plist
                    versionKey=KSVersion
          >
6/18/13 12:55:20.648 PM GoogleSoftwareUpdateDaemon[2717]: -[KSUpdateCheckAction performAction] KSUpdateCheckAction starting update check for ticket(s): {(
          <KSTicket:0x2275db0
                    productID=com.google.Keystone
                    version=1.1.0.3659
                    xc=<KSPathExistenceChecker:0x2271350 path=/Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/>
                    serverType=Omaha
                    url=https://tools.google.com/service/update2
                    creationDate=2010-06-26 10:54:43
          >,
          <KSTicket:0x22724a0
                    productID=com.google.talkplugin
                    version=4.0.1.13525
                    xc=<KSPathExistenceChecker:0x22709b0 path=/Library/Application Support/Google/GoogleTalkPlugin.app>
                    serverType=Omaha
                    url=https://tools.google.com/service/update2
                    creationDate=2010-05-23 23:21:36
          >
Using server: <KSOmahaServer:0x578620
          engine=<KSDaemonUpdateEngine:0x56f2a0>
          params={
                    EngineVersion = "1.1.0.3659";
                    ActivesInfo = {
                              "com.google.Chrome" = {
                                        LastRollCallPingDate = 2013-06-14 07:00:00 +0000;
                                        LastActiveDate = 2013-06-15 02:29:28 +0000;
                                        LastActivePingDate = 2013-06-14 07:00:00 +0000;
                              "com.google.Keystone" = {
                                        LastRollCallPingDate = 2013-06-18 07:00:01 +0000;
                                        LastActiveDate = 2013-06-18 16:55:19 +0000;
                                        LastActivePingDate = 2013-06-18 07:00:01 +0000;
                              "com.google.talkplugin" = {
                                        LastActiveDate = 2010-07-11 00:28:26 +0000;
                                        LastActivePingDate = 2010-07-11 07:00:00 +0000;
                                        LastRollCallPingDate = 2013-06-18 07:00:01 +0000;
                    UserInitiated = 0;
                    IsSystem = 1;
                    OmahaOSVersion = "10.8.4_i486";
                    Identity = KeystoneDaemon;
                    AllowedSubdomains = (
                              ".omaha.sandbox.google.com",
                              ".tools.google.com",
                              ".www.google.com",
                              ".corp.google.com"
>
6/18/13 12:55:20.649 PM GoogleSoftwareUpdateDaemon[2717]: -[KSUpdateCheckAction performAction] KSUpdateCheckAction running KSServerUpdateRequest: <KSOmahaServerUpdateRequest:0x28db30
          server=<KSOmahaServer:0x578620>
          url="https://tools.google.com/service/update2"
          runningFetchers=0
          tickets=2
          activeTickets=0
          rollCallTickets=0
          body=
                    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
                    <o:gupdate xmlns:o="http://www.google.com/update2/request" protocol="2.0" version="KeystoneDaemon-1.1.0.3659" ismachine="1">
                        <o:os platform="mac" version="MacOSX" sp="10.8.4_i486"></o:os>
                        <o:app appid="com.google.Keystone" version="1.1.0.3659" lang="en-us" installage="1088" brand="GGLG">
                            <o:updatecheck></o:updatecheck>
                        </o:app>
                        <o:app appid="com.google.talkplugin" version="4.0.1.13525" lang="en-us" installage="1121" brand="GGLG">
                            <o:updatecheck></o:updatecheck>
                        </o:app>
                    </o:gupdate>
>
6/18/13 12:55:20.891 PM GoogleSoftwareUpdateDaemon[2717]: -[KSUpdateCheckAction(KSServerUpdateRequestDelegate) serverRequest:fetchedWithResponse:] KSUpdateCheckAction received KSServerUpdateResponse: <KSOmahaServerUpdateResponse:0x5713d0
          server=<KSOmahaServer:0x578620>
          url="https://tools.google.com/service/update2"
          status=200
          tickets=2
          activeTickets=0
          rollCallTickets=0
          data=
                    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
                    <gupdate xmlns="http://www.google.com/update2/response" protocol="2.0" server="prod">
                        <daystart elapsed_seconds="35720"></daystart>
                        <app appid="com.google.Keystone" status="ok">
                            <updatecheck status="noupdate"></updatecheck>
                        </app>
                        <app appid="com.google.talkplugin" status="ok">
                            <updatecheck status="noupdate"></updatecheck>
                        </app>
                    </gupdate>
>
6/18/13 12:55:20.893 PM GoogleSoftwareUpdateDaemon[2717]: -[KSUpdateCheckAction(PrivateMethods) finishAction] KSUpdateCheckAction found updates: {( )}
6/18/13 12:55:20.895 PM GoogleSoftwareUpdateDaemon[2717]: -[KSPrefetchAction performAction] KSPrefetchAction no updates to prefetch.
6/18/13 12:55:20.896 PM GoogleSoftwareUpdateDaemon[2717]: -[KSMultiUpdateAction performAction] KSSilentUpdateAction had no updates to apply.
6/18/13 12:55:20.897 PM GoogleSoftwareUpdateDaemon[2717]: -[KSMultiUpdateAction performAction] KSPromptAction had no updates to apply.
6/18/13 12:55:20.898 PM GoogleSoftwareUpdateDaemon[2717]: -[KSUpdateEngine(PrivateMethods) updateFinish] KSUpdateEngine update processing complete.
6/18/13 12:55:22.086 PM GoogleSoftwareUpdateDaemon[2717]: -[KeystoneDaemon logServiceState] GoogleSoftwareUpdate daemon (1.1.0.3659) vending:
          com.google.Keystone.Daemon.UpdateEngine: 1 connection(s)
          com.google.Keystone.Daemon.Administration: 0 connection(s)
6/18/13 12:55:49.614 PM GoogleSoftwareUpdateDaemon[2717]: -[KeystoneDaemon main] GoogleSoftwareUpdateDaemon inactive, shutdown.
6/18/13 12:59:09.123 PM netbiosd[78]: name servers down?
6/18/13 1:09:09.599 PM com.apple.launchd[1]: (com.apple.xprotectupdater[2758]) Exited with code: 252
6/18/13 1:13:44.550 PM com.apple.backupd[2777]: Starting automatic backup
6/18/13 1:13:44.563 PM com.apple.backupd[2777]: Backing up to: /Volumes/FreeAgent GoFlex Drive/Backups.backupdb
6/18/13 1:13:50.878 PM com.apple.backupd[2777]: Deep event scan at path:/Users/yoonkwon/Pictures/Aperture Library.aplibrary/Database/apdb reason:must scan subdirs|missed reservation|
6/18/13 1:13:50.878 PM com.apple.backupd[2777]: Finished scan
6/18/13 1:13:51.339 PM com.apple.backupd[2777]: Found 120 files (337 MB) needing backup
6/18/13 1:13:51.352 PM com.apple.backupd[2777]: 747.4 MB required (including padding), 911.63 GB available
6/18/13 1:14:30.058 PM com.apple.backupd[2777]: Copied 1429 files (2 MB) from volume Macintosh HD.
6/18/13 1:14:30.089 PM com.apple.backupd[2777]: Using file event preflight for Macintosh HD
6/18/13 1:14:30.091 PM com.apple.backupd[2777]: Will copy (11 KB) from Macintosh HD
6/18/13 1:14:30.092 PM com.apple.backupd[2777]: Found 19 files (11 KB) needing backup
6/18/13 1:14:30.092 PM com.apple.backupd[2777]: 351.5 MB required (including padding), 911.62 GB available
6/18/13 1:15:01.966 PM com.apple.backupd[2777]: Copied 320 files (11 KB) from volume Macintosh HD.
6/18/13 1:15:02.344 PM com.apple.backupd[2777]: Created new backup: 2013-06-18-131501
6/18/13 1:15:02.920 PM com.apple.backupd[2777]: Starting post-backup thinning
6/18/13 1:15:07.107 PM com.apple.backupd[2777]: Deleted /Volumes/FreeAgent GoFlex Drive/Backups.backupdb/Yoon’s iMac/2013-06-17-123204 (2.6 MB)
6/18/13 1:15:07.107 PM com.apple.backupd[2777]: Post-back up thinning complete: 1 expired backups removed
6/18/13 1:15:07.207 PM com.apple.backupd[2777]: Backup completed successfully.
6/18/13 8:31:59.000 PM bootlog[0]: BOOT_TIME 1371601919 0