Here the crash log
Thread 2 Crashed:: com.apple.audio.IOThread.client
0 Kontakt 7 0x11fd2d073 NI::AB::ConstAudioBlock::freeOwnedBuffers() + 35
1 Kontakt 7 0x11e099015 NI::AB::InterfaceVST3Headless::attachBuffersToHost(Steinberg::Vst::ProcessData&) + 1093
2 Kontakt 7 0x11e09b69e NI::AB::InterfaceVST3Headless::process(Steinberg::Vst::ProcessData&) + 1630
3 GigPerformer4 0x10c44c677 0x10bd6e000 + 7202423
4 GigPerformer4 0x10c41c6b1 0x10bd6e000 + 7005873
5 GigPerformer4 0x10c41702b 0x10bd6e000 + 6983723
6 GigPerformer4 0x10c47395f 0x10bd6e000 + 7362911
7 GigPerformer4 0x10c385b1a 0x10bd6e000 + 6388506
8 GigPerformer4 0x10c3823be 0x10bd6e000 + 6374334
9 CoreAudio 0x7ff81606a4ad HALC_ProxyIOContext::IOWorkLoop() + 7391
10 CoreAudio 0x7ff816068205 invocation function for block in HALC_ProxyIOContext::HALC_ProxyIOContext(unsigned int, unsigned int) + 63
11 CoreAudio 0x7ff816234616 HALB_IOThread::Entry(void*) + 72
12 libsystem_pthread.dylib 0x7ff8145984e1 _pthread_start + 125
13 libsystem_pthread.dylib 0x7ff814593f6b thread_start + 15