When you open any photo that by default comes with 8-bit 100%, they leave me pictures in the image. Why? I've tried other Mac version of Adobe and operating system and goes well. Thank you.
Almost certainly a display adapter/ video card driver issue. Try turning off User Graphics Processor in Preferences > Performance. Make sure your video card driver is up to date. With Windows systems we stress that people need to go to the card maker's site. I don't know how that works with Macs.
What Photoshop version are you using?
What Mac hardware?
What version of OSX?
Thank you. It works!