I getting started with zend framework 2 and they have a prerequisite of an installation and configuration of mod_rewrite for apache. Apache 2.2.22 came pre-installed on Mac
In addition to Rob Allen's response, both line numbers are located around 168 and 169 (to save you some time from scrolling the 500+ lines of text). Also, to explain what each line does exactly:
LoadModule rewrite_module libexec/apache2/mod_rewrite.so
This overrides the default settings for any .htaccess files used at the document root
LoadModule php5_module libexec/apache2/libphp5.so
This allows URL rewrites for permalinks
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