You'll find that in the installation guides

@franton writes:

You'll find that in the installation guides

Indeed, the requirements haven't changed in quite some time:

You can host the JSS on any server that meets the following requirements:
- Java 1.7 or Java 1.8 (Java 1.8 is recommended)
- MySQL 5.5.x or 5.6.x (MySQL 5.6.x is recommended)
- Apache Tomcat 7 or 8 (Tomcat 8 is recommended)

Be aware, if you're tempted to try MySQL v5.7.x, that it will probably work with Casper 9.x, but I'd only suggest it for a new Casper installation.
If you're upgrading an existing Casper installation from MySQL v5.6.x to v5.7.x., you may encounter some issues.

Cheers Fellas, just checking

Best stable release (For OSX) : 5.6.30