mac Mamp issue - Do you already have another mysqld server running on port: 3306

I’m using Mamp and am setting up Zend Server Z-Ray.  After installation I noticed the SQL on my other site ( running on MAMP ) failed. 

To fix this in MAMP - 

Click on the General tab.  

In Mysql Port -> select a new number > valid numbers are from 1024 to 65535