Requires OS X Yosemite or higher
Using OS X Mavericks or earlier?
Requires Windows 7 or higher
Requires iOS 9
Requires Android 4.0 or higher
OS X 10.9 Mavericks and 10.8 Mountain Lion
1Password 4.4.3
OS X 10.7 Lion and 10.6 Snow Leopard
1Password 3.8.22
OS X 10.11 El Capitan
Knox 2.3.2
OS X 10.9 Mavericks and 10.10 Yosemite
Knox 2.3.1