yes, .exe files are strictly windows only programs.

Possibly put into search tab OSX or Mac after your other search term. Filter out sizes below 1, 5, or 10 MB perhaps depending on the normal size of what you are seeking. Example, Freeware mac or Freeware for mac only

The size filter can be handy to remove spam, but really depends on the normal size of what you are seeking. Some program files are around the 1-5 MB size, some are packages that are multiple 100 MB's in size.

I found better results using OSX's LW compared to using Windows LW. Just searching .dmg or mac with a Program type search seemed to bring some true results. Also, use the Find More Results option by Control clicking the search tab.