Trying to get testrpc running locally, has anyone run into this?  

    $ sudo npm install -g ethereumjs-testrpc
    npm WARN lifecycle [email protected]~preinstall: cannot run in wd %s %s (wd=%s) [email protected] node node-scrypt-preinstall.js /usr/local/lib/node_modules/.staging/scrypt-ffbb6685
    /usr/local/bin/testrpc -> /usr/local/lib/node_modules/ethereumjs-testrpc/bin/testrpc
    
    > [email protected] install /usr/local/lib/node_modules/ethereumjs-testrpc/node_modules/scrypt
    > node-gyp rebuild
    
      SOLINK_MODULE(target) Release/copied_files.node
    ld: library not found for -lgcc_s.10.5
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    make: *** [Release/copied_files.node] Error 1
    gyp ERR! build error 
    gyp ERR! stack Error: `make` failed with exit code: 2
    gyp ERR! stack     at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:276:23)
    gyp ERR! stack     at emitTwo (events.js:87:13)
    gyp ERR! stack     at ChildProcess.emit (events.js:172:7)
    gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:200:12)
    gyp ERR! System Darwin 14.5.0

...

    npm ERR! [email protected] install: `node-gyp rebuild`
    npm ERR! Exit status 1
    npm ERR! 
    npm ERR! Failed at the [email protected] install script 'node-gyp rebuild'.
    npm ERR! Make sure you have the latest version of node.js and npm installed.
    npm ERR! If you do, this is most likely a problem with the scrypt package,
    npm ERR! not with npm itself.
    npm ERR! Tell the author that this fails on your system:
    npm ERR!     node-gyp rebuild
    npm ERR! You can get information on how to open an issue for this project with:
    npm ERR!     npm bugs scrypt
    npm ERR! Or if that isn't available, you can get their info via:
    npm ERR!     npm owner ls scrypt
    npm ERR! There is likely additional logging output above.
    
    npm ERR! Please include the following file with any support request:
    npm ERR!     /Users/Maurice/Eth/solidity/testrpc/npm-debug.log
    npm ERR! code 1
    Maurice Macbook:testrpc Maurice$ sudo node update
    module.js:327
        throw err;
        ^