I contacted Native Instruments and heard back from them.
Your problem may not be GPO NI Player causing the crash, rather another Apple application. Perhaps the Unsanity Application Enhancer technology is crashing the computer when used with GPO. Perhaps it could be a combination of factors.
Unsanity makes small "hacks" which alter the operating system. Apple doesn't recommend them.
The crash log you posted reports thread 0 crashing with the APE extension in first thread.
Thread 0:According to NI, most users, after disabling this extension (deinstalling it) report that the crashes have stopped.
0 libSystem.B.dylib 0x9000b0a8 mach_msg_trap + 8
1 libSystem.B.dylib 0x9000affc mach_msg + 60
2 com.unsanity.ape 0xc0002afc __ape_internal + 3300
3 com.unsanity.ape 0xc0001910 __ape_agent + 64
4 libSystem.B.dylib 0x9002ba68 _pthread_body + 96
Hope this helps.