PKHeX is a save editor for core-series Pokémon games. With it, users can manipulate various save files including: .sav, .dsv, .dat, .gci, .raw, and .bin types. PKHeX can also read and write: .pk files, which are individual Pokémon files, and .pgt, .pcd, .pgf, .wc, which are Mystery Gift files.
PKHeX for Mac is a Mac OS App that was made using Wineskin. Thus, it is not a port of PKHeX. Using Wineskin, we can recreate an environment where executable files will run on Mac OS. All features from the original program should work in this app.
Credit to Kaphotics.