MacOS is absolutely not tailored to running one full screen program. Itâ(TM)s tailored for designers, developers, and video editors who bounce back and forth through multiple applications all day long. Thatâ(TM)s why it has Mission Control for switching between software and desktops. Itâ(TM)s common for graphic designers to have Photoshop, Illustrator, Indesign, a music player, and a browser open all the time. People who just want to run one piece of full screen software are either gamers running expensive PCs or office drones who spend their entire day in Word or Excel.