Other Versions of 1Password
Starting in 1Password 3.6, the minimum OS required is Mac OS X 10.6 Snow Leopard.
If you are on 10.4 Tiger or 10.5 Leopard, you can download one of our legacy versions of 1Password below. While we are happy to help if you have problems using these other releases, new features will not be added so it is recommended you upgrade to newer versions of OS X and your browser(s) as soon as possible.
Download: 1Password 3 for Mac OS X 10.5 Leopard
1Password 3.6 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.
Old Versions of Firefox
At this time, Mozilla is only issuing security updates for the latest version of Firefox and the older version 3. All other versions have unpatched security vulnerabilities. Additionally, it is not known how long Mozilla will be maintaining the older Firefox 3 browser. As a 1Password user, we know that you take security seriously, so we thought it was wise to let you know this.
In light of the above, it is obviously a good idea to upgrade to the latest Firefox version if at all possible. However, if you still decide to use an older version of Firefox for some reason, version 3 is the one we suggest.
Simply click the above link in Firefox to install the extension. Alternatively, if you download the extension via a different browser, drag and drop the file from Finder onto an open Firefox window.
Please note that the old 1Password extension for Firefox 3 is provided as is, and no further updates will be made to it.
Leopard Support for Google Chrome, Chromium, Canary, and RockMelt
The last version of the 1Password extension to support Google Chrome, Chromium, Canary, and RockMelt on OS X Leopard was version 3.6.3. You can download this version of the Chrome extension from here:
Important Installation Note: Chrome will prevent installation if a newer version is already installed. Be sure to go to the Window > Extensions screen and uninstall your existing version of 1Password. Then restart Chrome; this is important to avoid a Chrome bug where it incorrectly reports the file as invalid. After restarting Chrome, click the link above to start the install process.
Automatic Update Note: The automatic updater in this version has been disabled temporarily until the new Chrome extension is able to support the Chromium, Canary, and RockMelt Chrome variants. Once support is added you will be automatically updated, except on Leopard.
Camino 2, Flock, and Older Browsers
1Password 3.5 was the last version to support Camino 2 and Flock.
Mac OS X 10.4 Tiger
1Password 2.12.1 was the last version to support Tiger.
Note that 1Password 2 is free for 1Password 3 owners. In other words, 1Password 3 licenses will work in 1Password 2.