Slow Mac after 12/19 upgrade

Question

After the last upgrade from Apple on 12/19 2012, my Power Mac is much slower, it complained about network changes and several apps (SecondLife among them) are now crashing with :
Date/Time:       2012-12-25 09:05:21.053 -0700
OS Version:      Mac OS X 10.6.8 (10K549)
Report Version:  6
Exception Type:  EXC_CRASH (SIGILL)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread:  0  Dispatch queue: com.apple.main-thread
Application Specific Information:
BUG IN CLIENT OF LIBDISPATCH: Do not close random Unix descriptors
## And I see these in other logs..
### The packages installed...
Dec 19 21:41:59 Power-Mac-pro installd[11536]: PKG: extracting "com.apple.pkg.MobileDevice"
Dec 19 21:42:00 Power-Mac-pro installd[11536]: PKG: extracting "com.apple.pkg.CoreFP"
Dec 19 21:42:08 Power-Mac-pro installd[11536]: PKG: extracting "com.apple.pkg.iTunesX"
Dec 19 21:42:09 Power-Mac-pro installd[11536]: PKG: extracting "com.apple.pkg.iTunesAccess"
### New bugs are popping up..
Dec 20 14:00:20 Power-Mac-pro com.apple.launchd[1] (0x1022003f0.anonymous.nohup[153]): Bug: launchd_core_logic.c:8303 (24498):0
Dec 20 14:00:20 Power-Mac-pro com.apple.launchd[1] (0x1022003f0.anonymous.nohup[153]): Switching sessions is not allowed in the system Mach bootstrap.
Dec 20 14:00:20 Power-Mac-pro com.apple.launchd[1] (0x1022003f0.anonymous.nohup[153]): _vprocmgr_switch_to_session(): kr = 0x44c
### New allocation failures are filling my logs...
Dec 23 15:49:58 Power-Mac-pro Firestorm[3598]: Firestorm(3598,0xb0185000) malloc: *** mmap(size=2097152) failed (error code=12)\n*** error: can't allocate region\n*** set a breakpoint in malloc_error_break to debug
Dec 23 15:49:58 Power-Mac-pro [0x0-0x257257].com.secondlife.indra.viewer[3598]: Firestorm(3598,0xb0185000) malloc: *** mmap(size=2097152) failed (error code=12)
Dec 23 15:49:58 Power-Mac-pro [0x0-0x257257].com.secondlife.indra.viewer[3598]: *** error: can't allocate region
Dec 23 15:49:58 Power-Mac-pro [0x0-0x257257].com.secondlife.indra.viewer[3598]: *** set a breakpoint in malloc_error_break to debug
Dec 23 15:49:58 Power-Mac-pro [0x0-0x257257].com.secondlife.indra.viewer[3598]: terminate called after throwing an instance of 'std::bad_alloc'
Dec 23 15:49:58 Power-Mac-pro [0x0-0x257257].com.secondlife.indra.viewer[3598]:   what():  std::bad_alloc
Dec 25 08:59:39 Power-Mac-pro WindowServer[195]: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
Dec 25 08:59:39 Power-Mac-pro com.apple.WindowServer[195]: Tue Dec 25 08:59:39 Power-Mac-pro.local WindowServer[195] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
Dec 25 09:05:20 Power-Mac-pro /Applications/Phoenix Viewer.app/Contents/MacOS/Phoenix Viewer[337]: BUG in libdispatch: 10K549 - 1986 - 0x4
Dec 25 09:05:23 Power-Mac-pro com.apple.launchd.peruser.501[219] ([0x0-0x2b02b].com.secondlife.indra.viewer[337]): Job appears to have crashed: Illegal instruction
Dec 25 09:05:23 Power-Mac-pro ReportCrash[340]: Saved crash report for Phoenix Viewer[337] version Phoenix Viewer version 1.6.1 (1691) (1.6.1 (1691)) to /Users/Library/Logs/DiagnosticReports/Phoenix Viewer_2012-12-25-090523_Power-Mac-pro.crash
### And what's up with this!!!
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libapr-1.0.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libaprutil-1.0.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libcollada14dom.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libexception_handler.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libexpat.1.5.2.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libGLOD.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libapr-1.0.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libaprutil-1.0.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libcollada14dom.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libexception_handler.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libexpat.1.5.2.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libGLOD.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libapr-1.0.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libaprutil-1.0.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libcollada14dom.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libexception_handler.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libexpat.1.5.2.dylib': 93
Dec 25 09:01:45 Power-Mac-pro kernel[0]: CoreServicesUIAg[307] Unable to clear quarantine `libGLOD.dylib': 93
Any and all suggestions (except switching to Windoze) are appreciated:-)
Thanks all :-)
PS  system was upgraded to 12Gb RAM a year ago, and is running 10.6.8
<E-mail Edited by Host>

Answer 1

That's not a Power Mac, it's a Mac Pro; completely different archtecture and Power Mac can't run beyond 10.5.8.
We'll have this moved to the proper forum.