All of the Kernel Panics that I have had on this machine have been Parallels related, usually when starting up. Not sure what might be the problem. Here's a copy of panic.log after it went down today. (The long time period in between the last two crashes is partially due to the fact that I hadn't used this machine much for a few months.) Fri Jun 15 09:49:01 2007 panic(cpu 1 caller 0x001A429B): Unresolved kernel trap (CPU 1, Type 27=Unknown), registers: CR0: 0x8001003b, CR2: 0x0011a465, CR3: 0x00dcd000, CR4: 0x000006e0 EAX: 0x00000003, EBX: 0x6d626572, ECX: 0x3cb4c000, EDX: 0x2532bb60 CR2: 0x0011a465, EBP: 0x2532bba0, ESI: 0x6d616769, EDI: 0x63216e75 EFL: 0x00000002, EIP: 0x3b60952a, CS: 0x00000008, DS: 0x014d0010 Backtrace, Format - Frame : Return Address (4 potential args on stack) 0x2532b968 : 0x128d08 (0x3cb134 0x2532b98c 0x131de5 0x0) 0x2532b9a8 : 0x1a429b (0x3d0e4c 0x1 0x1b 0x3ca5fc) 0x2532bab8 : 0x19ada4 (0x2532bad0 0xe 0x0 0x19b6b4) 0x2532bba0 : 0x3b6093b4 (0x50d9ed6c 0xdeadbeef 0x246 0x3baa580) 0x2532bbd8 : 0x50d9f9f0 (0x3b6093a0 0x2532bc0c 0x108 0x60) 0x2532bd38 : 0x50d9c8c7 (0x4bf5384 0xc0185405 0x2532beb8 0x19e23a) 0x2532bd68 : 0x1f05d7 (0xd000000 0xc0185405 0x2532beb8 0x81) 0x2532bda8 : 0x1e7411 (0x2532bdd0 0x297 0x2532be08 0x49f0dac) 0x2532be08 : 0x1df212 (0x4bea9cc 0xc0185405 0x2532beb8 0x81) 0x2532be58 : 0x331c4c (0x3baa580 0xc0185405 0x2532beb8 0x49f0dac) 0x2532be88 : 0x34ffa8 (0x3baa580 0xc0185405 0x2532beb8 0x49f0dac) 0x2532bf58 : 0x379e23 (0x49f0dac 0x3a4d158 0x3a4d19c 0x0) 0x2532bfc8 : 0x19b17e (0x3a88ce0 0x0 0x19ac2b 0x4a75160) No mapping exists for frame pointer Backtrace terminated-invalid frame pointer 0xb011eeb8 Kernel loadable modules in backtrace (with dependencies): com.parallels.kext.vmmain(2.2)@0x50d9b000 Kernel version: Darwin Kernel Version 8.9.1: Thu Feb 22 20:55:00 PST 2007; root:xnu-792.18.15~1/RELEASE_I386 ********* Thu Jun 21 14:48:27 2007 panic(cpu 1 caller 0x001A429B): Unresolved kernel trap (CPU 1, Type 27=Unknown), registers: CR0: 0x8001003b, CR2: 0x3b762000, CR3: 0x00dcd000, CR4: 0x000006e0 EAX: 0x0000000a, EBX: 0x6d626572, ECX: 0x00000000, EDX: 0x01076818 CR2: 0x3b762000, EBP: 0x2529bb18, ESI: 0x6d616769, EDI: 0x63216e75 EFL: 0x00000246, EIP: 0x3b762001, CS: 0x00000008, DS: 0x3c8a0010 Backtrace, Format - Frame : Return Address (4 potential args on stack) 0x2529b908 : 0x128d08 (0x3cb134 0x2529b92c 0x131de5 0x0) 0x2529b948 : 0x1a429b (0x3d0e4c 0x1 0x1b 0x3ca5fc) 0x2529ba58 : 0x19ada4 (0x2529ba70 0x25290048 0x25290010 0x190010) 0x2529bb18 : 0x532b710a (0x39b9318 0x0 0x39b9304 0x16c) 0x2529bbd8 : 0x532b7862 (0x39b9304 0x2529beb8 0x18 0x0) 0x2529bd38 : 0x532b48c7 (0x39b9304 0xc0185401 0x2529beb8 0x6) 0x2529bd68 : 0x1f05d7 (0xf000000 0xc0185401 0x2529beb8 0x81) 0x2529bda8 : 0x1e7411 (0x2529bdd0 0x297 0x2529be08 0x48fc1f4) 0x2529be08 : 0x1df212 (0x4dbe4a4 0xc0185401 0x2529beb8 0x81) 0x2529be58 : 0x331c4c (0x49ce260 0xc0185401 0x2529beb8 0x48fc1f4) 0x2529be88 : 0x34ffa8 (0x49ce260 0xc0185401 0x2529beb8 0x48fc1f4) 0x2529bf58 : 0x379e23 (0x48fc1f4 0x4b33750 0x4b33794 0x0) 0x2529bfc8 : 0x19b17e (0x4ad5d20 0x0 0x10 0x0) No mapping exists for frame pointer Backtrace terminated-invalid frame pointer 0xbfffe038 Kernel loadable modules in backtrace (with dependencies): com.parallels.kext.vmmain(2.2)@0x532b3000 Kernel version: Darwin Kernel Version 8.9.1: Thu Feb 22 20:55:00 PST 2007; root:xnu-792.18.15~1/RELEASE_I386 ********* Mon Jul 30 10:43:18 2007 panic(cpu 0 caller 0x001A429B): Unresolved kernel trap (CPU 0, Type 27=Unknown), registers: CR0: 0x8001003b, CR2: 0x3b608000, CR3: 0x00e32000, CR4: 0x000006e0 EAX: 0x0000000a, EBX: 0x6d626572, ECX: 0x00000000, EDX: 0x01076818 CR2: 0x3b608000, EBP: 0x2536bb18, ESI: 0x6d616769, EDI: 0x63216e75 EFL: 0x00000246, EIP: 0x3b608001, CS: 0x00000008, DS: 0x3c740010 Backtrace, Format - Frame : Return Address (4 potential args on stack) 0x2536b908 : 0x128d08 (0x3cb134 0x2536b92c 0x131de5 0x0) 0x2536b948 : 0x1a429b (0x3d0e4c 0x0 0x1b 0x3ca5fc) 0x2536ba58 : 0x19ada4 (0x2536ba70 0x25360048 0x25360010 0x190010) 0x2536bb18 : 0x97310a (0x4c80298 0x0 0x4c80284 0x16c) 0x2536bbd8 : 0x973862 (0x4c80284 0x2536beb8 0x18 0x399435) 0x2536bd38 : 0x9708c7 (0x4c80284 0xc0185401 0x2536beb8 0x6) 0x2536bd68 : 0x1f05d7 (0xf000000 0xc0185401 0x2536beb8 0x81) 0x2536bda8 : 0x1e7411 (0x2536bdd0 0x297 0x2536be08 0x4ab1bb8) 0x2536be08 : 0x1df212 (0x4cacad4 0xc0185401 0x2536beb8 0x81) 0x2536be58 : 0x331c4c (0x4a54c40 0xc0185401 0x2536beb8 0x4ab1bb8) 0x2536be88 : 0x34ffa8 (0x4a54c40 0xc0185401 0x2536beb8 0x4ab1bb8) 0x2536bf58 : 0x379e23 (0x4ab1bb8 0x3ac4250 0x3ac4294 0x0) 0x2536bfc8 : 0x19b17e (0x3f47180 0x0 0x10 0x3f47180) No mapping exists for frame pointer Backtrace terminated-invalid frame pointer 0xbfffe038 Kernel loadable modules in backtrace (with dependencies): com.parallels.kext.vmmain(2.2)@0x96f000 Kernel version: Darwin Kernel Version 8.9.1: Thu Feb 22 20:55:00 PST 2007; root:xnu-792.18.15~1/RELEASE_I386 ********* Wed Sep 12 07:59:21 2007 panic(cpu 0 caller 0x001A4A55): Unresolved kernel trap (CPU 0, Type 27=Unknown), registers: CR0: 0x8001003b, CR2: 0x002a5004, CR3: 0x00e2d000, CR4: 0x000006e0 EAX: 0x00000003, EBX: 0x6d626572, ECX: 0x3cb92000, EDX: 0x25333b60 CR2: 0x002a5004, EBP: 0x25333ba0, ESI: 0x6d616769, EDI: 0x63216e75 EFL: 0x00000006, EIP: 0x3b64f52a, CS: 0x00000008, DS: 0x01530010 Backtrace, Format - Frame : Return Address (4 potential args on stack) 0x25333968 : 0x128d08 (0x3cc0a4 0x2533398c 0x131de5 0x0) 0x253339a8 : 0x1a4a55 (0x3d24b8 0x0 0x1b 0x3cb56c) 0x25333ab8 : 0x19aeb4 (0x25333ad0 0x0 0x2000 0x3b45a000) 0x25333ba0 : 0x3b64f3b4 (0x96cd6c 0xdeadbeef 0x246 0x4a94560) 0x25333bd8 : 0x96d9f0 (0x3b64f3a0 0x25333c0c 0x108 0x1a37c0) 0x25333d38 : 0x96a8c7 (0x4caa104 0xc0185405 0x25333eb8 0x25333de8) 0x25333d68 : 0x1f1668 (0xd000000 0xc0185405 0x25333eb8 0x81) 0x25333da8 : 0x1e84a2 (0x25333dd0 0x297 0x25333e08 0x409c5dc) 0x25333e08 : 0x1e02a3 (0x4c8ebdc 0xc0185405 0x25333eb8 0x81) 0x25333e58 : 0x332ac8 (0x4a94560 0xc0185405 0x25333eb8 0x409c5dc) 0x25333e88 : 0x350e24 (0x4a94560 0xc0185405 0x25333eb8 0x409c5dc) 0x25333f58 : 0x37ad83 (0x409c5dc 0x4c179d0 0x4c17a14 0x0) 0x25333fc8 : 0x19b28e (0x4bdab20 0x1 0x10 0x3b11660) No mapping exists for frame pointer Backtrace terminated-invalid frame pointer 0xb019feb8 Kernel loadable modules in backtrace (with dependencies): com.parallels.kext.vmmain(2.2)@0x969000 Kernel version: Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386 *********