I recently installed version 13 of Parallels on my Mac Mini (High Sierra, i7, 16GB RAM, 256GB ssd) and installed some Windows photo editors. Two of those were Photoshop CS5.1 and Corel PaintShopPro 2018. Both work properly when Parallels is running. I noticed the other day that if I am working on the Mac and right-click an image file and choose Open With, I am presented not only with the Mac photo editors, but also with the Windows version of Photoshop. That was a surprise to me as I did not think I would have the choice of the Windows apps as well, but I do not have the choice of PaintShop Pro. I assume the inclusion of Photoshop in my Open With choices is due to Parallels, but why is PaintShop Pro not included as well? Is there some setting that I have to make to have it available? I did nothing that I know of to get Photoshop listed. I am just puzzled as to why I have the choice of one, but not the other.