The complete error while loading the ./netca after making the installation is the following:

UnsatisfiedLinkError exception loading native library: njni10
Exception in thread "main" java.lang.UnsatisfiedLinkError: jniGetOracleHome
at oracle.net.common.NetGetEnv.jniGetOracleHome(Native Method)
at oracle.net.common.NetGetEnv.getOracleHome(Unknown Source)
at oracle.net.common.NetProperties.(Unknown Source)
at oracle.net.common.NetProperties.getInstance(Unknown Source)
at oracle.net.ca.CmdlineArgs.(Unknown Source)
at oracle.net.ca.InitialSetup.(Unknown Source)
at oracle.net.ca.NetCA.main(Unknown Source)

Ok , just follow the simple two steps ,

cd into $ORACLE_HOME/bin

then type: ln -s $ORACLE_HOME/lib/libnjni10.dylib $ORACLE_HOME/lib/libnjni10 , then ENTER

then type: ln -s $ORACLE_HOME/lib/libclntsh.dylib $ORACLE_HOME/lib/libclntsh.dylib.10.1

After that go into $ORACLE_HOME/bin and start ./netca

Problem solved, this simple solution came to me literally after hours of dealing with the situacion and very little help from ORACLE documentation on the issue.

Felipe