Macworld.com – On Tuesday, Roxio will release Popcorn 4, the latest version of the companyâs video conversion and burning software. Popcorn 4 costs $50, or $30 to upgrade for registered users of Popcorn or Toast, and runs only on Intel-based Macs with OS X 10.5 or 10.6 installed. (Note that the above link wonât be live untl the official announcement happens at 6:30AM eastern time.)