mvn command is not found on mac

Some times you might already fixed environment variables but after session out.. it will disappear.. in that case you have to do like this.

 Here I explained how to setup environment variable for Maven, Java

Since your installation works on the terminal you installed, all the exports you did, work on the current bash and its child process. but is not spawned to new terminals. env variables are lost if the session is closed; using .bash_profile, you can make it available in all sessions, since when a bash session starts, it 'runs' its .bashrc and .bash_profile Now follow these steps and see if it helps: type env | grep M2_HOME on the terminal that is working. This should give something like M2_HOME=/usr/local/apache-maven/apache-maven-3.1.1 typing env | grep JAVA_HOME should give like this: JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_40.jdk/Contents/Home Now you have the PATH for M2_HOME and JAVA_HOME. If you just do ls /usr/local/apache-maven/apache-maven-3.1.1/bin, you will see mvn binary there.  All you have to do now is to point to this location everytime using PATH. Since bash searches in all the directory path mentioned in PATH, it will find mvn. now open .bash_profile on Terminal  if you don't have one just create bash_profile vi ~/.bash_profile Add the following: #set JAVA_HOME JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_40.jdk/Contents/Home export JAVA_HOME M2_HOME=/usr/local/apache-maven/apache-maven-3.1.1 export M2_HOME PATH=$PATH:$JAVA_HOME/bin:$M2_HOME/bin export PATH After this click on esc button and : and wq so that your file will save. Now type source ~/.bash_profile   click enter This steps executes the commands in the .bash_profile file and you are good to go now.  Now type mvn --version