Legacy Versions of 1Password
As of 1Password 3.6, the minimum system version is Mac OS X 10.6 Snow Leopard. If you are on 10.4 or 10.5, we are making the deprecated releases available on an as-is basis.
1Password 2 for Mac OS X Tiger (10.4)
1Password 2 is offered for 1Password 3 owners running Macs with Tiger OS. 1Password 3 licenses will work in 1Password 2.
1Password 3 for Mac OS X Leopard (10.5) and Older Browsers
1Password 3.6.0 added support for OS X 10.7 (Lion), replacing OS X 10.5 (Leopard) support. The last supported version for Leopard is 1Password 3.5.9 for Mac. This was also the last version to support Camino 2, Firefox 3, and Flock.