Maven not found in Mac OSX mavericks

Maven is not installed any more by default on Mac OS X 10.9. You need to install it yourself, for example using Homebrew.

The command to install Maven using Homebrew is brew install maven

if you don't want to install homebrew (or any other package manager) just for installing maven, you can grab the binary from their site:

http://maven.apache.org/download.cgi

extract the content to a folder (e.g. /Applications/apache-maven-3.1.1) with

$ tar -xvf apache-maven-3.1.1-bin.tar.gz

and finally adjust your ~/.bash_profile with any texteditor you like to include

export M2_HOME=/Applications/apache-maven-3.1.1
export PATH=$PATH:$M2_HOME/bin

restart the terminal and test it with

$ mvn -version

Apache Maven 3.1.1 (0728685237757ffbf44136acec0402957f723d9a; 2013-09-17 17:22:22+0200)
Maven home: /Applications/apache-maven-3.1.1
Java version: 1.6.0_65, vendor: Apple Inc.
Java home: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
Default locale: de_DE, platform encoding: MacRoman
OS name: "mac os x", version: "10.9", arch: "x86_64", family: "mac"