SystemDoctor 3.0 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software is included in System Tools.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. You can install this program on Mac OS X 10.8 or later. This Mac application is an intellectual property of LXH. The most popular version of the software is 2.0. The program's installation file is generally known as systemdoctor.zip.
From the developer:
SystemDoctor is a handy utility to optimize your Mac disk and memory.
SystemDoctor can clean the unused files of your Mac, which will give you back much more disk space. It can clean the following files: caches, logs, downloads, mail download and trash.
You may want to check out more software for Mac, such as WinShortcutter, Jitouch or AntiRSI, which might be similar to SystemDoctor.