Mac Only: NS server is not able to connect to memcached. 8091 is unreachable.

=========================CRASH REPORT=========================

  crasher:

    initial call: memcached_config_mgr:init/1

    pid: <0.408.0>

    registered_name: []

    exception exit: {{badmatch,{error,couldnt_connect_to_memcached}},

                     [{ns_memcached,'-config_validate/1-fun-0-',1,

                                    [{file,"src/ns_memcached.erl"},

                                     {line,1589}]},

                      {async,'-async_init/4-fun-0-',3,

                             [{file,"src/async.erl"},{line,151}]}]}

      in function  gen_server:init_it/6 (gen_server.erl, line 328)

    ancestors: [ns_server_sup,ns_server_nodes_sup,<0.174.0>,

                  ns_server_cluster_sup,<0.90.0>]

    messages: [do_check]

    links: [<0.265.0>,<0.411.0>]

    dictionary: []

    trap_exit: false

    status: running

    heap_size: 6772

    stack_size: 27

    reductions: 27346

  neighbours:

=========================CRASH REPORT=========================

  crasher:

    initial call: ns_port_server:init/1

    pid: <0.85.0>

    registered_name: []

    exception exit: {abnormal,137}

      in function  gen_server:terminate/6 (gen_server.erl, line 744)

    ancestors: [<0.84.0>,<0.83.0>,ns_child_ports_sup,ns_babysitter_sup,

                  <0.59.0>]

    messages: [{'EXIT',#Port<0.3916>,normal}]

    links: [<0.84.0>]

    dictionary: []

    trap_exit: true

    status: running

    heap_size: 1598

    stack_size: 27

    reductions: 7849

  neighbours:

[error_logger:error,2018-01-30T17:17:21.269-08:00,babysitter_of_ns_1@127.0.0.1:error_logger<0.6.0>:ale_error_logger_handler:do_log:203]** Generic server <0.84.0> terminating

** Last message in was {die,{abnormal,137}}

** When Server state == {state,memcached,5000,1517357227626809,undefined,

                               infinity}

** Reason for termination ==

** {abnormal,137}