Could not load library client

[Sparton_Rob]

I use a mac 10.5.8 i know, stupid to game on a mac, im working on that. i bought garry's mod and when i try to play it, i get the error "could not load library client" ive tried reinstalling, deleting clientregestry.blob. deleting garry's mod folder in steam apps. verifying game cache, defragmenting files, and restarting steam. Here's my doorstop(mac) info: Model: iMac9,1, BootROM IM91.008D.B08, 2 processors, Intel Core 2 Duo, 2.66 GHz, 2 GB
Graphics: kHW_NVidiaGeForce9400Item, NVIDIA GeForce 9400, sppci_pci_device, 256 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8E), Broadcom BCM43xx 1.0 (5.10.91.22)
Bluetooth: Version 2.1.9f10, 2 service, 1 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: WDC WD3200AAJS-40H3A0, 298.09 GB
Serial ATA Device: OPTIARC DVD RW AD-5670S
And here's the console after crash: Process: hl2_osx [58352]
Path: /users/annelliott/library/application support/steam/steamapps/feardude789/garrysmod/hl2_osx
Identifier: hl2_osx
Version: ??? (???)
Code Type: X86 (Native)
Parent Process: steam [36156]

Interval Since Last Report: 1213 sec
Crashes Since Last Report: 1
Per-App Interval Since Last Report: 0 sec
Per-App Crashes Since Last Report: 1

Date/Time: 2013-01-03 13:09:32.331 -0800
OS Version: Mac OS X 10.5.8 (9L31a)
Report Version: 6
Anonymous UUID: F25914BF-96E5-451E-910A-A40210311F58

Exception Type: EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Crashed Thread: 0

Thread 0 Crashed:
0 engine.dylib 0x15cf1ed9 Sys_Error_Internal(bool, char const*, char*) + 633
1 engine.dylib 0x15cf1a53 Sys_Error(char const*, ...) + 35
2 engine.dylib 0x15b38bc4 ClientDLL_Load() + 228
3 engine.dylib 0x15cf47cb CModAppSystemGroup::Create() + 75
4 engine.dylib 0x15d36a12 CAppSystemGroup::OnStartup() + 34
5 engine.dylib 0x15d369c0 CAppSystemGroup::Run() + 32
6 engine.dylib 0x15cf4669 CEngineAPI::RunListenServer() + 105
7 launcher.dylib 0x0070428a CSourceAppSystemGroup::Main() + 26
8 launcher.dylib 0x0070f9de CAppSystemGroup::Run() + 46
9 launcher.dylib 0x0071953b CSteamApplication::Main() + 43
10 launcher.dylib 0x0070f9de CAppSystemGroup::Run() + 46
11 launcher.dylib 0x00716a85 ValveCocoaMain + 277
12 launcher.dylib 0x007048a7 LauncherMain + 919
13 hl2_osx 0x00001dd5 start + 53

Thread 1:
0 libSystem.B.dylib 0x9753f34e __semwait_signal + 10
1 libSystem.B.dylib 0x9758f908 pthread_cond_timedwait$UNIX2003 + 72
2 libsteam.dylib 0x157637cd WaitForEvent(void*, unsigned int) + 505
3 libsteam.dylib 0x15767e88 WaitForMultipleObjectsEx(unsigned int, void* const*, int, unsigned int, int) + 718
4 libsteam.dylib 0x1576819b WaitForSingleObject(void*, unsigned int) + 54
5 libsteam.dylib 0x156e3ff6 Grid::CEngineConnection::CallbackThreadProc() + 42
6 libsteam.dylib 0x156e5392 common::ObjFunctorImpl0<Grid::CEngineConnection, void (Grid::CEngineConnection::*)()>::operator()() + 38
7 libsteam.dylib 0x1561cdf1 common::CThread::CImpl::Thread() + 107
8 libsteam.dylib 0x1561d3ec common::CThread::CImpl::ThreadProc(void*) + 90
9 libsteam.dylib 0x1576517c _threadEntry(void*) + 142
10 libSystem.B.dylib 0x97569055 _pthread_start + 321
11 libSystem.B.dylib 0x97568f12 thread_start + 34

Thread 2:
0 libSystem.B.dylib 0x9753f34e __semwait_signal + 10
1 libSystem.B.dylib 0x9758f908 pthread_cond_timedwait$UNIX2003 + 72
2 libtier0.dylib 0x0005d280 CThreadSyncObject::Wait(unsigned int) + 320
3 libtier0.dylib 0x0005d468 CThreadEvent::Wait(unsigned int) + 24
4 libvstdlib.dylib 0x000fa91b CJobThread::Run() + 379
5 libtier0.dylib 0x0005e576 CThread::ThreadProc(void*) + 278
6 libSystem.B.dylib 0x97569055 _pthread_start + 321
7 libSystem.B.dylib 0x97568f12 thread_start + 34

Thread 3:
0 libSystem.B.dylib 0x97538166 mach_msg_trap + 10
1 libSystem.B.dylib 0x9753f95c mach_msg + 72
2 com.apple.CoreFoundation 0x912d5e7e CFRunLoopRunSpecific + 1790
3 com.apple.CoreFoundation 0x912d6aa8 CFRunLoopRunInMode + 88
4 com.apple.audio.CoreAudio 0x92fee5f8 HALRunLoop::OwnThread(void*) + 160
5 com.apple.audio.CoreAudio 0x92fee480 CAPThread::Entry(CAPThread*) + 96
6 libSystem.B.dylib 0x97569055 _pthread_start + 321
7 libSystem.B.dylib 0x97568f12 thread_start + 34

Thread 4:
0 libSystem.B.dylib 0x975688c6 kevent + 10
1 libtier0_s.dylib 0x18543503 CatchAndWriteContext_t::Invoke() + 159
2 libtier0_s.dylib 0x1854308d CatchAndWriteMiniDumpExForVoidPtrFn + 86
3 libtier0_s.dylib 0x185430b7 CatchAndWriteMiniDumpForVoidPtrFn + 37
4 steamclient.dylib 0x18cb6e01 OSXHelpers::CIOPollingHelper::Run() + 41
5 libtier0_s.dylib 0x18546de6 SteamThreadTools::CThread::ThreadExceptionWrapper(void*) + 16
6 libtier0_s.dylib 0x18543503 CatchAndWriteContext_t::Invoke() + 159
7 libtier0_s.dylib 0x1854308d CatchAndWriteMiniDumpExForVoidPtrFn + 86
8 libtier0_s.dylib 0x185430b7 CatchAndWriteMiniDumpForVoidPtrFn + 37
9 libtier0_s.dylib 0x18546d5e SteamThreadTools::CThread::ThreadProc(void*) + 204
10 libSystem.B.dylib 0x97569055 _pthread_start + 321
11 libSystem.B.dylib 0x97568f12 thread_start + 34

Thread 5:
0 libSystem.B.dylib 0x9753f34e __semwait_signal + 10
1 libSystem.B.dylib 0x97569ccd pthread_cond_wait$UNIX2003 + 73
2 libGLProgrammability.dylib 0x954a9b32 glvmDoWork + 162
3 libSystem.B.dylib 0x97569055 _pthread_start + 321
4 libSystem.B.dylib 0x97568f12 thread_start + 34

Thread 6:
0 libSystem.B.dylib 0x9753f34e __semwait_signal + 10
1 libSystem.B.dylib 0x97569ccd pthread_cond_wait$UNIX2003 + 73
2 GLEngine 0x19a7ad17 gleCmdProcessor + 375
3 libSystem.B.dylib 0x97569055 _pthread_start + 321
4 libSystem.B.dylib 0x97568f12 thread_start + 34

Thread 0 crashed with X86 Thread State (32-bit):
eax: 0x00000000 ebx: 0xbfffe768 ecx: 0x00000000 edx: 0x00000000
edi: 0x15cf1c71 esi: 0x24133210 ebp: 0xbfffeb78 esp: 0xbfffe730
ss: 0x0000001f efl: 0x00210246 eip: 0x15cf1ed9 cs: 0x00000017
ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037
cr2: 0x224c9000

Binary Images:
0x1000 - 0x1ff3 +hl2_osx ??? (???) <937f814f63c53f7da761a56a7f67893d> /users/annelliott/library/application support/steam/steamapps/feardude789/garrysmod/hl2_osx
0x4000 - 0x5ff3 +steamloader.dylib ??? (???) <ee606d39f5a732de87f965f4ad30c598> /Applications/Steam.app/Contents/MacOS/osx32/steamloader.dylib
0x2c000 - 0x43ffb +gameoverlayrenderer.dylib ??? (???) <d16d92e7845732f687538b73dd6dc449> /Applications/Steam.app/Contents/MacOS/osx32/gameoverlayrenderer.dylib
0x58000 - 0x6bff7 +libtier0.dylib ??? (???) <649837a63166305594ce6054e4a1dcc5> /users/annelliott/library/application support/steam/steamapps/feardude789/garrysmod/bin/libtier0.dylib
0xf3000 - 0x108ff7 +libvstdlib.dylib ??? (???) <c29772bdc6f437c8bebea06e545cf84d> /users/annelliott/library/application support/steam/steamapps/feardude789/garrysmod/bin/libvstdlib.dylib
0x1e6000 - 0x1efff7 +com.unsanity.smartcrashreports Smart Crash Reports version 1.5b2 (1.5b2) /Library/InputManagers/Smart Crash Reports/Smart Crash Repor