McAfee cannot guarantee that any products are available for testing at any given time, nor can they provide support for them in these forums or through the normal Technical Support or Customer Service channels.
There is support however via a dedicated Beta Forum and through a bug reporting/feature request system.
Testing beta products is entirely at your own risk and is not recommended on machines used for work or other important functions.
Always read the EULA (End User Licensing Agreement) and any release notes, terms and conditions, etc., before using beta (or any other) products.