List of Apple operating systems

The following is a list of operating systems released by Apple Inc.

Apple computers

Apple II

Apple DOS is the first operating system for Apple computers^[1]
Apple ProDOS
Apple GS/OS

Apple III

Apple SOS

Apple Lisa

Macintosh computers

Classic Mac OS

System 1
System 2
System 3
System 4
System Software 5 – also marketed as System 5
System Software 6 – also marketed as System 6
System 7 – System 7.5.1 was the first to refer to itself as Mac OS, Mac OS 7.6 was the first to be branded as "Mac OS"
Mac OS 8
Mac OS 9 – Mac OS 9.2.2 was the last version of Classic Mac OS

Mac OS X / OS X / macOS

macOS was previously known as Mac OS X and later OS X.

Mac OS X Public Beta – code name Kodiak
Mac OS X 10.0 – code name Cheetah
Mac OS X 10.1 – code name Puma
Mac OS X 10.2 – also marketed as Jaguar
Mac OS X Panther – 10.3
Mac OS X Tiger – 10.4
Mac OS X Leopard – 10.5
Mac OS X Snow Leopard – 10.6 (requires purchase)
Mac OS X Lion – 10.7 – also marketed as OS X Lion (requires purchase)
OS X Mountain Lion – 10.8 (requires purchase)
OS X Mavericks – 10.9 (free)
OS X Yosemite – 10.10 (free)
OS X El Capitan – 10.11 (free)
macOS Sierra – 10.12 (free)
macOS High Sierra – 10.13 (free)
macOS Mojave – 10.14 (free)
macOS Catalina – 10.15 (free)
macOS Big Sur – 11 (free)

macOS Server

macOS Server was previously known as Mac OS X Server and later OS X Server.

Mac OS X Server 1.0 – code name Hera, also referred to as Rhapsody
Mac OS X Server 10.0 – code name Cheetah
Mac OS X Server 10.1 – code name Puma
Mac OS X Server 10.2 – code name Jaguar
Mac OS X Server 10.3 – code name Panther
Mac OS X Server 10.4 – code name Tiger
Mac OS X Server 10.5 – also marketed as Leopard Server
Mac OS X Server 10.6 – also marketed as Snow Leopard Server

Starting with Lion, there is no separate Mac OS X Server operating system. Instead the server components are a separate download from the Mac App Store.

Mac OS X Lion Server – 10.7 – also marketed as OS X Lion Server
OS X Mountain Lion Server – 10.8 – also marketed as Mountain Lion Server
OS X Mavericks Server – 10.9 – also marketed as Mavericks Server
OS X Yosemite Server – 10.10 – also marketed as Yosemite Server 4.0
OS X 10.11 Server 5.0 – also marketed as OS X Server 5.0
OS X 10.11 Server 5.1 – also marketed as OS X Server 5.1
macOS 10.12 Server 5.2 – also marketed as macOS Server 5.2
macOS 10.12 Server 5.3 – also marketed as macOS Server 5.3
macOS 10.13 Server 5.4 – also marketed as macOS Server 5.4
macOS 10.13 Server 5.5 – also marketed as macOS Server 5.5

Other macOS-related releases

Others

Newton

Newton OS

iPod

iPod OS

Apple TV

Apple TV Software

Apple TV Software 1 – derived from Mac OS X 10.4 Tiger
Apple TV Software 2 – derived from Mac OS X 10.4 Tiger
Apple TV Software 3 – derived from Mac OS X 10.4 Tiger
Apple TV Software 4 – derived from iOS 4 and iOS 5
Apple TV Software 5 – derived from iOS 5 and iOS 6
Apple TV Software 6 – derived from iOS 7
Apple TV Software 7 – derived from iOS 8

There was no Apple TV Software 8, version 8 was skipped when moving to tvOS.

tvOS

tvOS 9 – derived from iOS 9
tvOS 10 – derived from iOS 10
tvOS 11 – derived from iOS 11
tvOS 12 – derived from iOS 12
tvOS 13 - derived from iOS 13

iOS

iOS was previously known as iPhone OS, despite also being available on the iPod Touch (1st, 2nd, and 3rd generations) and the original iPad.

iPhone OS 1 – derived from "OS X" (At the time, "macOS" was still known as "Mac OS X" and not "OS X" as it was known from 2012 to 2016.)
iPhone OS 2
iPhone OS 3
iOS 4 – continued from iPhone OS 3
iOS 5
iOS 6
iOS 7
iOS 8
iOS 9
iOS 10
iOS 11
iOS 12
iOS 13
iOS 14

iPadOS

At its June 2019 Worldwide Developer Conference, Apple introduced iPadOS, a version of iOS, for iPad tablets, promised for fall 2019 release.^[2]^[3]

iPadOS

iPadOS 13 – derived from iOS 13
iPadOS 14 - derived from iOS 14

watchOS

watchOS 1 – derived from iOS 8
watchOS 2 – derived from iOS 9
watchOS 3 – derived from iOS 10
watchOS 4 – derived from iOS 11
watchOS 5 – derived from iOS 12
watchOS 6 – derived from iOS 13
watchOS 7 – derived from iOS 14

Table of operating systems


Device(s)	Platform(s)	OS	Announced	Released	Discontinued	Notes
Apple computers	Apple II series	Apple DOS	June 1978	June 1978	1983
		Apple ProDOS	1983	1983	1993
		Apple GS/OS	1988	1988
	Apple III	Apple SOS	1980	1980
	Apple Lisa	Lisa OS	1983	1983
	Apple Lisa	MacWorks XL	1984	1984
Macintosh computers (68k)	Classic Mac OS	System 1	1984	1984
		System 2	1985	1985
		System 3	1986	1986
		System 4	1987	1987
		System Software 5	1987	1987		Also marketed as System 5
		System Software 6	1988	1988		Also marketed as System 6
Macintosh computers (68k and PowerPC)		System 7	1991	1991		System 7.5.1 was the first to refer to itself as Mac OS Mac OS 7.6 was the first to be branded as "Mac OS"
Macintosh computers (68k and PowerPC)		Mac OS 8	1997	1997
Macintosh computers (PowerPC)		Mac OS 9	1999	1999
	Mac OS X	Mac OS X Public Beta	September 13, 2000	September 13, 2000	May 14, 2001	Code name Kodiak
		Mac OS X 10.0	September 13, 2000	March 24, 2001		Code name Cheetah
		Mac OS X 10.1	September 25, 2001	September 25, 2001		Code name Puma
		Mac OS X 10.2		August 23, 2002		Code name Jaguar
		Mac OS X Panther		October 24, 2003		Version 10.3
Macintosh computers (PowerPC and X86)		Mac OS X Tiger		April 29, 2005		Version 10.4
Macintosh computers (PowerPC and X86)		Mac OS X Leopard		October 26, 2007		Version 10.5
Macintosh computers (X86)		Mac OS X Snow Leopard		August 28, 2009		Version 10.6
		Mac OS X Lion		July 20, 2011		Version 10.7 Also marketed as OS X Lion
	OS X	OS X Mountain Lion		July 25, 2012		Version 10.8
		OS X Mavericks		October 22, 2013		Version 10.9
		OS X Yosemite		October 16, 2014		Version 10.10
		OS X El Capitan		June 8, 2015		Version 10.11
	macOS	macOS Sierra		June 13, 2016		Version 10.12
		macOS High Sierra		June 5, 2017		Version 10.13
		macOS Mojave		September 24, 2018		Version 10.14
		macOS Catalina		October 7, 2019		Version 10.15
Macintosh computers (PowerPC)	Mac OS X Server	Mac OS X Server 1.0	March 16, 1999	March 16, 1999		Code name Hera Also referred to as Rhapsody
		Mac OS X Server 10.0		May 21, 2001		Code name Cheetah
		Mac OS X Server 10.1		September 25, 2001		Code name Puma
		Mac OS X Server 10.2		August 23, 2002		Code name Jaguar
		Mac OS X Server 10.3		October 24, 2003		Code name Panther
Macintosh computers (PowerPC and X86)		Mac OS X Server 10.4		April 29, 2005		Code name Tiger
Macintosh computers (PowerPC and X86)		Mac OS X Server 10.5		October 26, 2007		Also marketed as Leopard Server
Other computers		NeXTSTEP		September 18, 1989
		OpenStep		1994
		Darwin		November 15, 2000
		A/ROSE
		A/UX
		AIX for Apple Network Servers
		Macintosh Application Environment
		MkLinux
		PowerOpen Environment
		Star Trek		N/A	N/A
		Taligent		N/A	N/A
		Copland		N/A	N/A
Newton	Newton	Newton OS
iPod	iPod	iPod OS				See also iPod firmware
Apple TV	Apple TV Software (X86)	Apple TV Software 1	September 12, 2006	March 21, 2007	February 12, 2008	Derived from Mac OS X 10.4 Tiger Used an updated Front Row interface
		Apple TV Software 2	January 15, 2008^[4]	February 12, 2008^[5]	October 2009	Derived from Mac OS X 10.4 Tiger Also marketed as Apple TV Take Two Removed Front Row
		Apple TV Software 3		October 2009		Derived from Mac OS X 10.4 Tiger
	Apple TV Software (ARM)	Apple TV Software 4				Derived from iOS 4 and iOS 5
		Apple TV Software 5				Derived from iOS 5 and iOS 6
		Apple TV Software 6				Derived from iOS 7
		Apple TV Software 7^{[note 1]}				Derived from iOS 8
	tvOS	tvOS 9^{[note 1]}				Derived from iOS 9
		tvOS 10				Derived from iOS 10
		tvOS 11				Derived from iOS 11
		tvOS 12				Derived from iOS 12
iOS devices (iPhone, iPod Touch, and iPad)	iPhone OS^{[note 2]}	iPhone OS 1^{[note 2]}				Derived from "OS X" (At the time, "macOS" was still known as "Mac OS X" and not "OS X" as it was known from 2012 to 2016.)
		iPhone OS 2^{[note 2]}
		iPhone OS 3^{[note 2]}
	iOS^{[note 2]}	iOS 4^{[note 2]}				Continued from iPhone OS 3
		iOS 5
		iOS 6
		iOS 7
		iOS 8
		iOS 9
		iOS 10
		iOS 11
Apple Watch	watchOS	watchOS 1				Derived from iOS 8
		watchOS 2				Derived from iOS 9
		watchOS 3				Derived from iOS 10
		watchOS 4				Derived from iOS 11
		watchOS 5				Derived from iOS 12

Notes

^ ^a ^b There was no Apple TV Software 8 or tvOS 8, version 8 was skipped when moving to tvOS.
^ ^a ^b ^c ^d ^e ^f iOS was previously known as iPhone OS, despite also being available on the iPod Touch (1st, 2nd, and 3rd generations) and the original iPad.

^ Apple OS History. Computer Hope. 05/21/2018. [2019-01-11].
^ Warren, Tom (2019-06-03). "Apple reveals iPadOS for iPad with a new home screen, multitasking improvements, and more". The Verge. Retrieved 2019-06-17.
^ Jaffe, Justin. "Apple introduces iPadOS, giving iPads their own operating system". CNET. Retrieved 2019-06-17.
^ http://www.macnn.com/articles/08/01/15/apple.tv.take.2/
^ http://www.macnn.com/articles/08/02/12/apple.tv.take.2.update/

[AppleTVOSVersion8-6] There was no Apple TV Software 8 or tvOS 8, version 8 was skipped when moving to tvOS.

[iPhoneOSvsiOS-7] ^ ^a ^b ^c ^d ^e ^f iOS was previously known as iPhone OS, despite also being available on the iPod Touch (1st, 2nd, and 3rd generations) and the original iPad.

[1] Apple OS History. Computer Hope. 05/21/2018. [2019-01-11].

[2] Warren, Tom (2019-06-03). "Apple reveals iPadOS for iPad with a new home screen, multitasking improvements, and more". The Verge. Retrieved 2019-06-17.

[3] Jaffe, Justin. "Apple introduces iPadOS, giving iPads their own operating system". CNET. Retrieved 2019-06-17.

[4] ttp://www.macnn.com/articles/08/01/15/apple.tv.take.2/

[5] ttp://www.macnn.com/articles/08/02/12/apple.tv.take.2.update/

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