iMac late 2009 freezes

Getting once/month freezes on the iMac. Running OS 10.10.1 12gigs RAM. Per a previous question/post here is the print out from Console. Freeze happened right around 4:40pm:

1/7/15 4:35:52.865 PM com.apple.backupd[4920]: Will copy (26.4 MB) from Macintosh HD 1/7/15 4:35:52.866 PM com.apple.backupd[4920]: Found 804 files (26.4 MB) needing backup 1/7/15 4:35:52.904 PM com.apple.backupd[4920]: 1.23 GB required (including padding), 265.13 GB available 1/7/15 4:36:46.559 PM com.apple.WebKit.Networking[717]: tcp_connection_destination_prepare_complete 16551 connectx to 2607:f8b0:400a:807::2000.80@0 failed: No route to host 1/7/15 4:36:50.419 PM networkd[137]: -[NETClientConnection scrubParametersForEntitlements:] client com.apple.WebKi.4723 setting source application without entitlement 1/7/15 4:37:28.686 PM networkd[137]: -[NETClientConnection scrubParametersForEntitlements:] client com.apple.WebKi.4723 setting source application without entitlement 1/7/15 4:37:35.258 PM configd[25]: inet_set_autoaddr(en1, 1) failed, Resource busy (16) 1/7/15 4:37:57.926 PM networkd[137]: -[NETClientConnection scrubParametersForEntitlements:] client com.apple.WebKi.4723 setting source application without entitlement 1/7/15 4:38:05.000 PM kernel[0]: 436612.477285: Invoking getKEY_RSC 1/7/15 4:38:23.310 PM discoveryd[4753]: Basic NATTServer Got control URL: http:// {192.168.0.1:5431//uuid:00247bec-5640-4056-ec7b-240024ec400002/WANPPPConnection:1} (ppp) 1/7/15 4:39:43.543 PM configd[25]: inet_set_autoaddr(en1, 1) failed, Resource busy (16) 1/7/15 4:41:52.391 PM configd[25]: inet_set_autoaddr(en1, 1) failed, Resource busy (16) 1/7/15 4:41:57.444 PM com.apple.backupd[4920]: Copied 863 items (26.6 MB) from volume Macintosh HD. Linked 13725. 1/7/15 4:42:27.865 PM com.apple.backupd[4920]: Created new backup: 2015-01-07-164227 1/7/15 4:42:29.404 PM com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform. 1/7/15 4:42:29.411 PM com.apple.xpc.launchd[1]: (com.apple.xpc.launchd.domain.pid.backupd.4920) Failed to bootstrap path: path = /System/Library/PrivateFrameworks/AccountsDaemon.framework/XPCServices/DataclassOwnersManager copy.xpc, error = 128: The specified path is not a bundle 1/7/15 4:42:29.623 PM apsd[50]: MessageTracer: load_domain_prefix_whitelist:120: Missing default whitelist file: /System/Library/PrivateFrameworks/CrashReporterSupport.framework/Resources/SubmitDiagInfo.default.domains 1/7/15 4:42:29.720 PM com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform. 1/7/15 4:42:29.720 PM com.apple.xpc.launchd[1]: (com.apple.xpc.launchd.domain.pid.syncdefaultsd.4928) Failed to bootstrap path: path = /System/Library/PrivateFrameworks/AccountsDaemon.framework/XPCServices/DataclassOwnersManager copy.xpc, error = 128: The specified path is not a bundle 1/7/15 4:42:30.170 PM com.apple.backupd[4920]: Starting post-backup thinning 1/7/15 4:42:30.172 PM com.apple.backupd[4920]: No post-backup thinning needed: no expired backups exist 1/7/15 4:42:30.207 PM com.apple.backupd[4920]: Backup completed successfully. 1/7/15 4:43:05.000 PM kernel[0]: 436912.477529: Invoking getKEY_RSC 1/7/15 4:44:00.254 PM configd[25]: inet_set_autoaddr(en1, 1) failed, Resource busy (16) 1/7/15 4:44:53.000 PM bootlog[0]: BOOT_TIME 1420677893 0