Download of LockRattler 4.37 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The application lies within Security Tools, more precisely Mac protection. This free Mac app was originally created by Howard Oakley.
From the developer:
LockRattler offers a quick check of macOS security protection systems. It is a simple and free app which checks out some of the more important protection systems. All you need to do is decompress it, drop it into your Applications folder, run it, and click on its single button. It will then tell you the result of the checks on those security systems.
You may want to check out more Mac applications, such as ProtectMac AntiVirus, Security Camera or VPN Tracker, which might be related to LockRattler.