It tuned out that I had to specify the mamp php:

    */1 * * * * /Applications/MAMP/bin/php/php7.0.0/bin/php -c /Library/Application\ Support/appsolute/MAMP\ PRO/conf/php.ini /Users/magento-2/bin/magento cron:run >> /Users/magento-2/var/log/setup.cron.log&
    */1 * * * * /Applications/MAMP/bin/php/php7.0.0/bin/php -c /Library/Application\ Support/appsolute/MAMP\ PRO/conf/php.ini /Users/magento-2/update/cron.php >> /Users/magento-2/var/log/setup.cron.log&
    */1 * * * * /Applications/MAMP/bin/php/php7.0.0/bin/php -c /Library/Application\ Support/appsolute/MAMP\ PRO/conf/php.ini /Users/magento-2/bin/magento setup:cron:run >> /Users/magento-2/var/log/setup.cron.log&