The latest version of QuickBooks Desktop POS, version 18.0, has added a few improvements to its features from version 12.0, including making customer information easier to access. This post only includes the list of old QuickBooks Pro versions. Click for Premier, Enterprise, or Mac versions. Operating System: Windows Vista, Windows 8, Windows 8.1, Windows 10, Windows 7, and Windows XP are the operating systems that are required in operating the QuickBooks Point of Sale (POS). RAM: The minimum RAM requirement is 2GB to make the application software work in your system successfully. Hard Disk Space: The users are recommended to have a minimum of 1 GB of free space in their hard disk.