title: pecl install mongodb on mac, fatal error: 'Security/Security.h' file not found
body: <p>I used <code>pecl</code> to install MongoDB extension on mac, but it fails</p>
  <p>I get the following error:</p>
  <blockquote>
  <p>ERROR: 'make' failed</p>
  <p>/private/tmp/pear/install/mongodb/src/libmongoc/src/libmongoc/src/mongoc/mongoc-rand-common-crypto.c:25:10: fatal error: 'Security/Security.h' file not found</p>
  <p>1 error generated.</p>
  <p>make: *** [src/libmongoc/src/libmongoc/src/mongoc/mongoc-rand-common-crypto.lo] Error 1</p>
  <p>ERROR: `make' failed</p>
  </blockquote>
  <p>What is wrong?</p>