Open a Terminal and Locate your osx php version with:
which php
On Maverick the result should be:
/usr/bin/php
2. Backup (move) your original php binary:
sudo mv /usr/bin/php /usr/bin/php.bak
sudo ln -s /Applications/MAMP/bin/php/php5.4.25/bin/php /usr/bin/php
It works like a charm, alias in bashrc doesn't work out. So must do it this way. Thanks @Heik