If you've already installed almost any NI software, you will have NI MAX installed on your system. Installing NI-VISA will also install NI MAX. To find the versions currently installed on your system:
The easiest way to tell which version of MAX you have installed is click Help»About from within MAX.
Expand My System»Software in NI MAX to find the version of NI-VISA installed.
Determine the Version of the NI Software Installed on My Computer further explains how to determine which NI software is currently installed on your system.