List of Apple's Operating System Releases

Apple Inc.

For Apple II

• Apple DOS
• UCSD Pascal
• ProDOS
• GS/OS

For Apple III

• SOS (Sophisticated Operating System)

For Apple Lisa

• Lisa OS

For Apple Newton

• Newton OS

Classic Mac OS

• System 1
• System 2
• System 3
• System 4
• System 5
• System 6
• System 7
  • For 68k CPUs
    • System 7 (codenamed "Big Bang")
  • For Intel 386 CPUs
    • "Star Trek" (System 7.1 running on DR DOS "StarTrek", a Novell DOS 7 precursor; never released to market)
• Mac OS 8
• Mac OS 9

Attempts to modernize the Classic Mac OS

• Copland (never released to market)

Unix-like operating systems

• For Macintosh Computers
  • For 68k CPUs
    • A/UX
  • For PowerPC CPUs
    • MkLinux
    • Rhapsody
    • Mac OS X Server
      • Mac OS X v10.0 (aka "Cheetah")
      • Mac OS X v10.1 (aka "Puma")
      • Mac OS X v10.2 (aka "Jaguar")
      • Mac OS X v10.3 (aka "Panther")
  • For PowerPC and Intel CPUs
    • Mac OS X
      • Mac OS X v10.4 (aka "Tiger")
      • Mac OS X v10.5 (aka "Leopard")
  • For Intel CPUs
    • Mac OS X
      • Mac OS X v10.6 (aka "Snow Leopard")
      • Mac OS X v10.7 (aka "Lion")
      • OS X v10.8 (aka "Mountain Lion") (From this point on it will no longer be called "Mac OS X" it will be called "OS X")
      • Mac OS X Server
• For iPhone/iPod Touch/iPad/Apple TV
  • iOS
• For iPod Classic/iPod Nano/iPod Mini/iPod Shuffle
  • iPod software