There is nothing from Apple, except Preview, which some devs use for icons and screenshots, etc. PS is not that good for apps, unless used with the devRocket plug-in, maybe.
Check the Mac App Store...perhaps Pixelmator, and of course, open source.
Just want to change something in some photos
thanks anyway i thout apple have one i'll download it
thank you very much
get Gimp or Imagemagick