May I suggest trying the Bitnami install of WordPress. Bitnami provides the necessary “tools” to run WordPress on your Mac (or PC) but hides the complexity of the installation and setup process for those who just want to “get going” with trying WP.
I just tried it out on my 2 y/o Mac Mini, OS 10.9.2 and it works just fine and is a snap to get going. Just download the Installer – WordPress 3.8.1 for OS X 64 bit (top of the list) – from bitnami.com/stack/wordpress, double click the downloaded dmg file and follow the instructions. Accept the defaults but be aware of a couple “opt-ins”.
Another item of note is that it also installs a number of plugins, some of which are really not required just to “get going”, but are fine to have nonetheless (Contact Form 7 for example).