Install hadoop on Mac ref: http://qiita.com/AlfredT/items/063465354edaf53261be

file0.txt

$ brew update
$ brew install hadoop

file1.txt

$ cd /usr/local/Cellar/hadoop/2.7.0//libexec/etc/hadoop/

file10.txt

$hdfs namenode -format

file11.txt

$ ssh-keygen -t rsa
$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

file12.txt

$ ssh localhost
$ exit

file13.txt

$ hstart
$ hstop

file14.txt

$ hadoop fs -mkdir /test
$ hadoop dfs -ls /
$ hadoop fs -rmdir /test
$ hadoop dfs -ls /
$ hadoop jar /usr/local/opt/hadoop/libexec/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.2.0.jar pi 5 10

file2.txt

export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true"

file3.txt

export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true -Djava.security.krb5.realm= -Djava.security.krb5.kdc="

file4.txt

<configuration>
 <property>
  <name>hadoop.tmp.dir</name>
  <value>/usr/local/Cellar/hadoop/hdfs/tmp</value>
  <description>A base for other temporary directories.</description>
 </property>
 <property>
  <name>fs.default.name</name>
  <value>hdfs://localhost:9000</value>
 </property>
</configuration>

file5.txt

$ cp mapred-site.xml.template mapred-site.xml

file6.txt

<configuration>
 <property>
  <name>mapred.job.tracker</name>
  <value>localhost:9010</value>
 </property>
</configuration>

file7.txt

<configuration>
 <property>
  <name>dfs.replication</name>
  <value>1</value>
 </property>
</configuration>

file8.txt

alias hstart="/usr/local/Cellar/hadoop/2.7.0/sbin/start-dfs.sh;/usr/local/Cellar/hadoop/2.7.0/sbin/start-yarn.sh" alias hstop="/usr/local/Cellar/hadoop/2.7.0/sbin/stop-yarn.sh;/usr/local/Cellar/hadoop/2.7.0/sbin/stop-dfs.sh"

file9.txt

$ source ~/.profile