As you may know, FotoSketcher is a Windows only program and I am currently working on a truly multiplatform version (testing on Android at first).
But since it is a complete rewrite of most of my code (which can be a good thing to iron out some bugs), it is also a rather large undertaking for a single hobbyist programmer like myself.
Having been asked many times for a MacOS version, I looked into various solutions: emulation software (either free like WineHQ or not, like Parallels Desktop), or recompilation with a cutting edge framework (crossVCL, which looks very promising).
In the meantime, I have packaged the latest FotoSketcher version (3.30 at this time) into a Mac compatible program using WineBottler.
Here the .zip file (warning 75 MB, thank you www.fosshub.com for hosting): https://www.fosshub.com/FotoSketcher.html/FotoSketcher_MacOS.zip
Just open it and run FotoSketcher on your Mac!
CAVEAT : I have only tested on OS X El Capitan. Apart from a few quirks - mainly visual - I have found FotoSketcher to work fine. But, as usual, use at your own risk and I shall not be held responsible should anything bad happen.
How to install:
Once you've downloaded FotoSketcher_MacOS.zip, move it to the location of your choice (I have simply chosen the desktop).
Then open the .zip file as shown below:
This will extract FotoSketcher and create the program icon.
Double-click to run, and voila!
One of the problems you may encounter is that the trackbars will not update correctly (as shown in the screenshot above). However, you can still move the cursor to the value you want and the parameters will be changed accordingly.
Have fun :)