Download of ActionTimer 1.7.1 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within System Tools, more precisely Automation. This free Mac app was originally developed by Malaud LLC. We recommend checking the downloaded files with any free antivirus.
From the developer:
Smart countdown timer that runs selected action on completion.
Capture a screenshot in the background while you're focusing on your work. ActionTimer will save the screenshot in your selected folder. You can schedule multiple screenshots at various times. ActionTimer can also provide a voice announcement and gives you an audio & visual notification before taking a screenshot. So, you always know when a screenshot is being taken.
You may want to check out more Mac applications, such as iPAD, Bulldog or Launch!, which might be related to ActionTimer.