MySQL服务器无法在OSX上启动

First I have installed MariaDB on my OSX and then I have installed XAMPP on MY OSX. Now I can start apache web server but MYSQL server is not starting.

I have a few questions which are listed below?

1. Is it because of MariaDB already installed?
2. Is it a port issue?
3. XAMPP have MariaDB instance so what happened with the older MariaDB instance.

Can someone share their experience with the above questions?

ANS : Error occurred because 3306 port is already taken. Change the port number and it will work fine.