Winclone 6 requires macOS 10.11+. Winclone 5 requires 10.9+. Winclone 4 requires 10.9 or higher including macOS Sierra. Winclone 3 macOS 10.7 or higher including 10.10 Yosemite. If you wish to purchase Winclone 3, 4, or 5, go ahead and buy Winclone 6 Standard or Winclone 6 Pro and request a link to the earlier version by emailing email@example.com. Let us know your license number and we will give you access to the older version of Winclone.