Though this guide says the following DBs are supported, I still got it installed on a SQL 2012 DB with the latest SQL Native Client for 2012.
Evaluators-Guide says:
View Composer requires a SQL database to store data with connections and components of linked-clone
desktops. Supported databases are:
• Microsoft SQL Server 2005 SP4
• Microsoft SQL Server 2008 Express R2 SP1 64-bit
• Microsoft SQL Server 2008 Standard, Enterprise R2 (32- and 64-bit)
• Microsoft SQL Server 2008 Standard, Enterprise, Datacenter SP2 (32- and 64-bit)