Open Console.app

/Applications/Utilities/Console.app

or use Spotlight

Find

LOG Files → ~/Library/Logs → CrashReporter

Find the log titled by

"Digital Performer_year_month_date_time..."

Make sure you locate the correct one identified by the date and the time.

Here is a header of a crash log sample:

Process:         Digital Performer [692]
Path:            /Applications/_Music/Digital Performer 7.1.app/Contents/MacOS/Digital Performer
Identifier:      com.motu.DigitalPerformer
Version:         7.1 (7.1)
Code Type:       X86 (Native)
Parent Process:  launchd [162]

Date/Time:       2010-01-20 00:44:36.200 -0500
OS Version:      Mac OS X 10.6.2 (10C540)
Report Version:  6

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000005631314e
Crashed Thread:  15

The crash log header above indicates the crash occurred at Thread 15. Scroll down and locate Thread 15.

This example shows the crash was caused by a 3rd-party AU plug-in.

How to read Kernel Panic Log

Instead of ~/Library/Logs/CrashReporter explained above, KP log is kept under root directory:

/Library/Logs/DiagnosticReports/kernel_year_date_time_<hostname>.panic

Note: above example is under Snow Leopard.

Here is a sample log block:

Interval Since Last Panic Report:  4270934 sec
Panics Since Last Report:          3
Anonymous UUID:                    41BB49D1-9291-4896-9425-6B7C7D4698F3

Sun Jan 10 01:40:23 2010
panic(cpu 1 caller 0x2a7ac2): Kernel trap at 0x56803fe9, type 14=page fault, registers:
CR0: 0x8001003b, CR2: 0x56803fe9, CR3: 0x00100000, CR4: 0x00000660
EAX: 0x08e7db00, EBX: 0x08e65100, ECX: 0x312f0000, EDX: 0x08e7de00
CR2: 0x56803fe9, EBP: 0x5bd63ad8, ESI: 0x07cf7780, EDI: 0x0085ff18
EFL: 0x00010246, EIP: 0x56803fe9, CS:  0x00000008, DS:  0x01e60010
Error code: 0x00000011

Backtrace (CPU 1), Frame : Return Address (4 potential args on stack)
0x5bd638d8 : 0x21b2bd (0x5cf868 0x5bd6390c 0x223719 0x0) 
0x5bd63928 : 0x2a7ac2 (0x591c30 0x56803fe9 0xe 0x591dfa) 
0x5bd63a08 : 0x29d968 (0x5bd63a20 0x246 0x5bd63ad8 0x56803fe9) 
0x5bd63a18 : 0x56803fe9 (0xe 0x48 0x5bd60010 0x230010) 
0x5bd63ad8 : 0x5d30b821 (0x8e65100 0x0 0xffff 0x15f) 
0x5bd63af8 : 0x4fcc12 (0x8e65000 0x85ff18 0x1 0x0) 
0x5bd63b18 : 0x50cc50 (0x8e65000 0x85ff18 0x5bd63b48 0x4fcf95) 
0x5bd63b48 : 0x50cdc4 (0x7cf7780 0x0 0x1 0x0) 
0x5bd63b68 : 0x4fcc12 (0x7cf7780 0x0 0x1 0x1) 
0x5bd63b88 : 0x4fcc2d (0x7cf7780 0x0 0x5bd63bb8 0x4fcc12) 
0x5bd63ba8 : 0x52ef30 (0x7cf7780 0xffff 0x7cf7a44 0x4fcc2d) 
0x5bd63bc8 : 0x52ef63 (0x7cf7a40 0x246 0x5bd63c08 0x917a3f0) 
0x5bd63be8 : 0x4fcc12 (0x7cf7a40 0x0 0x1 0x1e) 
0x5bd63c08 : 0x4fcc2d (0x7cf7a40 0x0 0x5bd63c58 0x0) 
0x5bd63c28 : 0x2830b4 (0x7cf7a40 0x917a3f0 0x1e 0x5bd63c58) 
0x5bd63c78 : 0x21d676 (0x8812698 0x75fd5a0 0x817b584 0x1) 
0x5bd63cb8 : 0x2107f7 (0x8812600 0x12 0x5bd63d18 0x20f258) 
0x5bd63d18 : 0x21db45 (0x8812600 0x10000 0x0 0x210588) 
0x5bd63d48 : 0x23f12d (0x5bd63d6c 0x24 0x91bc944 0x0) 
0x5bd63d98 : 0x214d2c (0x917a3f0 0x1 0x1 0x221959) 
	Backtrace continues...
      Kernel Extensions in backtrace (with dependencies):
         com.digidesign.mbox2.driver(8.0.3f1)@0x5d306000->0x5d325fff
            dependency: com.apple.iokit.IOAudioFamily(1.7.2fc1)@0x5c316000
            dependency: com.apple.iokit.IOUSBFamily(3.8.5)@0x5b620000
            dependency: com.apple.driver.AppleUSBMergeNub(3.8.5)@0x5bb63000

BSD process name corresponding to current thread: coreaudiod