Safari 5.1.7 update disables out-of-date Flash versions

After pushing out OS X Lion 10.7.4 which included Safari version 5.1.6, Apple rolled out a separate update for the browser that can be downloaded by OS X 10.7.3 Snow Leopard, OS X 10.7.4 Lion and Windows users.

According to Apple's Safari 5.1.7 Support Page, the update is meant to disable older versions of Flash that pose a security risk as they lack the latest vulnerability patches.

Safari 5.1.7 will scan a Mac's Flash assets for out-of-date software, disable it if found and inform the user via a dialog box. A link to Adobe's website is integrated into the dialog so that users can easily locate and install the most current Flash Player.

If users need to roll back to a previous version of Flash, they must navigate to the "/Library/Internet Plug-Ins (Disabled)" folder on their Mac, drag "Flash Player.plugin" into the active "/Library/Internet Plug-Ins" folder and restart the browser. A brief tutorial is provided at Apple's Support Pages.

From the release notes:

Lion

Safari 5.1.7 contains improvements to performance, stability, compatibility, and security, including changes that:

Improve the browser's responsiveness when the system is low on memory

Fix an issue that could prevent webpages from responding after using a pinch to zoom gesture

Fix an issue that could affect websites using forms to authenticate users

Disable versions of Adobe Flash Player that do not include the latest security updates and provide the option to get the current version from Adobe's website.

Windows

Safari 5.1.7 contains improvements to performance, stability, compatibility, and security, including changes that:

Improve the browser's responsiveness when the system is low on memory

Fix an issue that could affect websites using forms to authenticate users

Apple has become increasingly leery about third-party applications, perhaps due to the recent Flashback malware debacle that affected more than 600,000 Macs worldwide. One of the trojan's first iterations was discovered in 2011 when it disguised itself as a Flash Installer, though the exploit had nothing to do with Adobe's software.

Most recently, Apple released a Java update to cope with Flashback and even created a dedicated removal tool for those Mac owners who didn't already have Java installed on their computers.

The Safari update comes in at 44.98MB for Lion and 47.72MB for Snow Leopard and can be downloaded via Software Update or Apple's Support Downloads page.