The 5.5 version of ZendGuard for Mac is provided as a free download on our website. The most popular version among ZendGuard for Mac users is 5.5. The application belongs to Security Tools. This Mac download was checked by our built-in antivirus and was rated as clean. This Mac app is an intellectual property of Zend Technologies Ltd.
From the developer:
Zend Guard is the industry leading solution for PHP IP protection. Zend Guard provides independent software vendors and IT managers with the ability to safely distribute and manage the distribution of their PHP applications while protecting their source code. Zend Optimizer is a free application that runs the files encoded using Zend Guard and enhances the overall performance of your PHP applications. As software vendors write more and more commercial applications in PHP it is critical that their intellectual property (all their hard work) is protected. With more applications providing evaluation copies and electronic downloads it is an even more complicated to insure that they are being distributed securely, whether free, for evaluation or for commercial sale.
You may want to check out more software for Mac, such as eToken, guapdf 3 or Eclipse-RPC, which might be related to ZendGuard.