Thanks Linc for your reply. I'm pasting below information and I hope that I don't overdo it! Part of the full report corresponding to sandboxd[63298] I'm pasting it afterwards the messages from the Console. In the System Diagnostic Report, there are no crash and panic logs. But there is a log about the Dashboard.app from yesterday though at a different time then when this lockup actually occurred. I'm not pasting it now as I noticed that it had only information about different running threads and binary images and it is quite long. If you suggest then I can paste this as well? Please let me know.
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6/4/13 11:30:49.813 AM mDNSResponder[51]: SSLHandshake failed: -9806
6/4/13 11:30:49.813 AM mDNSResponder[51]: tcpCallback: stream connection for LLQ _autotunnel6.1050971659.members.btmm.icloud.com. (PTR) failed 5 times, retrying in 81162 ms
6/4/13 11:32:14.432 AM mdworker[63298]: Unable to talk to lsboxd
6/4/13 11:32:14.495 AM sandboxd[63299]: ([63298]) mdworker(63298) deny mach-lookup com.apple.ls.boxd
6/4/13 11:32:14.000 AM kernel[0]: Sandbox: sandboxd(63299) deny mach-lookup com.apple.coresymbolicationd
6/4/13 11:54:55.000 AM bootlog[0]: BOOT_TIME 1370339695 0
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Full report corresponding to sandboxd[63298], I have removed the some portions about different running threads and the binary images section hoping that it isn't required.
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mdworker(63298) deny mach-lookup com.apple.ls.boxd
Process: mdworker [63298]
Path: /System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework /Versions/A/Support/mdworker
Load Address: 0x10e091000
Identifier: mdworker
Version: ??? (???)
Code Type: x86_64 (Native)
Parent Process: launchd [144]
Date/Time: 2013-06-04 11:32:14.445 +0200
OS Version: Mac OS X 10.8.3 (12D78)
Report Version: 8
Thread 0:
0 libsystem_kernel.dylib 0x00007fff8fcc6686 mach_msg_trap + 10
1 CoreFoundation 0x00007fff954d1233 __CFRunLoopServiceMachPort + 195
2 CoreFoundation 0x00007fff954d6916 __CFRunLoopRun + 1078
3 CoreFoundation 0x00007fff954d60e2 CFRunLoopRunSpecific + 290
4 CoreFoundation 0x00007fff954e4dd1 CFRunLoopRun + 97
5 mdworker 0x000000010e099ba9
6 libdyld.dylib 0x00007fff9059d7e1 start + 0
Thread 1:
0 libsystem_kernel.dylib 0x00007fff8fcc8d16 kevent + 10
1 libdispatch.dylib 0x00007fff929bf9ee _dispatch_mgr_thread + 54
Thread 2:
0 libsystem_kernel.dylib 0x00007fff8fcc6686 mach_msg_trap + 10
1 liblaunch.dylib 0x00007fff890687c4
2 liblaunch.dylib 0x00007fff890674d9 bootstrap_look_up3 + 69
3 libxpc.dylib 0x00007fff94e0fc21 _xpc_connection_bootstrap_look_up_slow + 371
4 libxpc.dylib 0x00007fff94e0ec82 _xpc_connection_init + 1062
5 libdispatch.dylib 0x00007fff929bd0b6 _dispatch_client_callout + 8
6 libdispatch.dylib 0x00007fff929be47f _dispatch_queue_drain + 235
7 libdispatch.dylib 0x00007fff929be2f1 _dispatch_queue_invoke + 52
8 libdispatch.dylib 0x00007fff929be448 _dispatch_queue_drain + 180
9 libdispatch.dylib 0x00007fff929be2f1 _dispatch_queue_invoke + 52
10 libdispatch.dylib 0x00007fff929be1c3 _dispatch_worker_thread2 + 249
11 libsystem_c.dylib 0x00007fff94694d0b _pthread_wqthread + 404
12 libsystem_c.dylib 0x00007fff9467f1d1 start_wqthread + 13