To install and run jboss AS standalone you can follow the processes described below(assuming that you already have java 7 and jdk installed on your mac):
Download the jboss application server from here.
Unzip the package and extract the folders
Set up the your bash_profile like the following:
open -a TextEdit ~/.bash_profile
In your bash_profile
add the following variables:
export JBOSS_HOME=/Users/$USER/Desktop/Servers/jboss-as-7.1.1.Final
JAVA_HOME=`/usr/libexec/java_home -v 1.7`
Then move to jboss installation directory and cd
into the bin directory.
In the bin directory
./standalone.sh
This should start your jboss as a standalone application server. You should see your admin page at http://localhost:8080/
NB: This installation process does not work with Java 8