Error starting apache httpd-2.4.4 configured with mod_jk
Found the problem. I was pointing to the wrong apxs version (httpd-2.2) while configuring the mod_jk build.

native$ ./configure CFLAGS='-arch x86_64' APXSLDFLAGS='-arch x86_64' --with-apxs=/usr/sbin/apxs


After compiling mod_jk with the right apxs file, httpd started without any issues.

native$ ./configure CFLAGS='-arch x86_64' APXSLDFLAGS='-arch x86_64' --with-apxs=/usr/local/apache/bin/apxs