when starting eth on macos

gistfile1.txt

(lldb) bt
* thread #1: tid = 0x2236, 0x00007fff8c1a0286 libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
    frame #0: 0x00007fff8c1a0286 libsystem_kernel.dylib`__pthread_kill + 10
    frame #1: 0x00007fff9934f42f libsystem_pthread.dylib`pthread_kill + 90
    frame #2: 0x00007fff9254eb53 libsystem_c.dylib`abort + 129
    frame #3: 0x00007fff8e428a21 libc++abi.dylib`abort_message + 257
    frame #4: 0x00007fff8e4509b9 libc++abi.dylib`default_terminate_handler() + 243
    frame #5: 0x00007fff907dd7eb libobjc.A.dylib`_objc_terminate() + 124
    frame #6: 0x00007fff8e44e0a1 libc++abi.dylib`std::__terminate(void (*)()) + 8
    frame #7: 0x00007fff8e44db30 libc++abi.dylib`__cxa_throw + 121
  * frame #8: 0x000000010a323f07 eth`void boost::throw_exception<boost::lock_error>(e=0x00007fff55968188) + 119 at throw_exception.hpp:69
    frame #9: 0x000000010a324013 eth`boost::mutex::lock(this=0x00007fa39a807f28) + 99 at mutex.hpp:119
    frame #10: 0x000000010a323e73 eth`boost::unique_lock<boost::mutex>::lock(this=0x00007fff55968310) + 227 at lock_types.hpp:346
    frame #11: 0x000000010a323d87 eth`boost::unique_lock<boost::mutex>::unique_lock(this=0x00007fff55968310, m_=0x00007fa39a807f28) + 39 at lock_types.hpp:124
    frame #12: 0x000000010a3236dd eth`boost::unique_lock<boost::mutex>::unique_lock(this=0x00007fff55968310, m_=0x00007fa39a807f28) + 29 at lock_types.hpp:125
    frame #13: 0x000000010a329c87 eth`boost::shared_mutex::lock_shared(this=0x00007fa39a807f20) + 55 at shared_mutex.hpp:188
    frame #14: 0x000000010a329c33 eth`boost::shared_lock<boost::shared_mutex>::lock(this=0x00007fff55968458) + 227 at lock_types.hpp:645
    frame #15: 0x000000010a329b47 eth`boost::shared_lock<boost::shared_mutex>::shared_lock(this=0x00007fff55968458, m_=0x00007fa39a807f20) + 39 at lock_types.hpp:520
    frame #16: 0x000000010a329dbd eth`boost::shared_lock<boost::shared_mutex>::shared_lock(this=0x00007fff55968458, m_=0x00007fa39a807f20) + 29 at lock_types.hpp:521
    frame #17: 0x000000010a2d2588 eth`dev::eth::BlockChain::currentHash(this=0x00007fa39a8071b8) const + 56 at BlockChain.h:201
    frame #18: 0x000000010a2cce8c eth`dev::eth::BlockChain::details(this=0x00007fa39a8071b8) const + 60 at BlockChain.h:138
    frame #19: 0x000000010a2affd0 eth`main(argc=6, argv=0x00007fff5597abf8) + 118176 at main.cpp:1794
    frame #20: 0x00007fff8be625c9 libdyld.dylib`start + 1
    frame #21: 0x00007fff8be625c9 libdyld.dylib`start + 1