Actually, the install works fine but I am running into segmentation violation while running top_block.py through GRC GUI or uhd_fft on command line. Somewhere I am guessing Python versions are getting messed up. Here is the crash log after running 'uhd_fft -f 868M -s 10M'; how do I figure out what is causing the crash?
Process: Python [98722]
Path: /opt/local/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
Identifier: org.python.python
Version: 2.7.14 (2.7.14)
Code Type: X86-64 (Native)
Parent Process: bash [93492]
Responsible: Python [98722]
User ID: 503
Date/Time: 2018-02-02 10:19:04.736 -0800
OS Version: Mac OS X 10.12.6 (16G1114)
Report Version: 12
Anonymous UUID: 120FE2C9-C399-E258-2FCC-CB15EFBA9026
Sleep/Wake UUID: F31F40DE-3B36-4430-A542-C83035144872
Time Awake Since Boot: 270000 seconds
Time Since Wake: 2000 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000037312e0000
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [0]
VM Regions Near 0x37312e0000:
__LINKEDIT 00000001266f3000-00000001266ff000 [ 48K] r--/rwx SM=COW /System/Library/Extensions/IOUSBFamily.kext/Contents/PlugIns/IOUSBLib.bundle/Contents/MacOS/IOUSBLib
-->
STACK GUARD 000070000c905000-000070000c906000 [ 4K] ---/rwx SM=NUL stack guard for thread 1
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libgnuradio-blocks.3.7.11.dylib 0x00000001188b7f36 boost::asio::detail::task_io_service::init_task() + 134
1 libgnuradio-blocks.3.7.11.dylib 0x00000001188a4367 boost::asio::io_service::service* boost::asio::detail::service_registry::create<boost::asio::datagram_socket_service<boost::asio::ip::udp> >(boost::asio::io_service&) + 105
2 libuhd.003.dylib 0x0000000119442167 boost::asio::detail::service_registry::do_use_service(boost::asio::io_service::service::key const&, boost::asio::io_service::service* (*)(boost::asio::io_service&)) + 127