The 1.4 version of ScreenToLayers for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
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. This free Mac application is a product of Jeremy Vizzini. The application lies within Design & Photo Tools, more precisely Viewers & Editors.
From the developer:
ScreenToLayers allows you to capture your screen as a layered PSD file. It is located in the menu bar to give you a quick access. The application includes an alternative interface to select only the component you need. Moreover, you can disable advanced settings, such as the shadow or the framing. ScreenToLayers can also handle a multi-screens setup.
You may want to check out more software for Mac, such as PulpMotion Advanced, Kid Pix Deluxe 3X or I Can Animate, which might be similar to ScreenToLayers.