Carbon Copy Cloner requires macOS. CCC will not run on Windows.
Carbon Copy Cloner 5 is the latest version available. Users running Yosemite (10.10), El Capitan (10.11), Sierra (10.12), or High Sierra (10.13) should use this version of CCC. If you are having trouble downloading CCC from the link above, try this alternate download location.
Upgrading from CCC 4? CCC 5 is a paid upgrade. CCC 4 Personal and Household licenses purchased prior to May 22, 2017 are eligible for upgrade pricing. When you open CCC 5, it will automatically retrieve your new license or an upgrade coupon that you can use to purchase CCC 5 at 50% off. CCC 4 licenses purchased on or after May 22, 2017 are eligible for a free CCC 5 upgrade license.
Carbon Copy Cloner 4.1.21 is compatible with Mountain Lion (10.8), Mavericks (10.9), Yosemite (10.10), El Capitan(10.11), Sierra (10.12) and High Sierra (10.13). Note that while this version of CCC will work on El Capitan, Sierra and High Sierra, we recommend that El Capitan, Sierra and High Sierra users upgrade to CCC 5. We will continue to offer limited support for CCC 4 on a case-by-case basis, but we are no longer actively developing this version. If you are having trouble downloading CCC from the link above, try this alternate download location.