List of Mac OS versions

Note: The headings on this list indicate the Macintosh System bundle names; the bullet points indicate the version of the System File included in that bundle. This is to make it clearer for people searching for specific bundle versions as opposed to System File versions. Finder File versions are not indicated.

Classic Mac OS

Macintosh System Software (0 - 0.3)

System File 1

System 0.85 (128k) (1983)
System 1.0 (128k / 512k) (1984) (also numbered System 0.97)
System 1.1 (128k / 512k) (1984)

System File 2

System 2.0 (128k / 512k) (1985)

System Software with HD20 Support (0.5)

System File 2

System 2.1 (128k / 512k with HD20) (1985)

Macintosh System Software (0.7)

System File 3

System 3.0 (128k / 512k / 512ke / Plus) (1986)

System Software 1

System File 3

System Software 2

System File 4

System 4.0 (512k+) (1987)
System 4.1 (Plus+) (1987)

System Software 5

System File 4

System 4.2 (Plus+) (1987)
System 4.3 (Plus+) (1987)

System Software 6

System 6.0.0 (68k) (1988)
System 6.0.1 (68k) (1988)
System 6.0.2 (68k) (1988)
System 6.0.3 (68k) (1989)
System 6.0.4 (68k) "Antares" (1989)
System 6.0.5 (68k) "Big Deal" (1990)
System 6.0.6 "SixPack" — never released due to AppleTalk bug
System 6.0.7 (68k) (1990)
System 6.0.8 (68k) "Terminator" (1991)
System 6.0.8L (Classic, LC, PB100) (1992) — limited machine-only release for the Pacific market
System 6.0.8.1 (1992) — limited machine-only release for the international market
System 6.1 (1992) — limited machine-only release for the Middle Eastern market

System Software 7

A.K.A. "Big Bang", "Blue", "M80", "Pleiades".

"System" designation

Mac OS X / macOS

Mac OS X Server

OS X Server 10.7 and later are software add-ons to the base OS, and do not get their own releases

Mac OS X Developer Preview

Mac OS X Public Beta "Kodiak" (2000)

OS X Public Beta runs on stock PowerMac G3 and G4 computers with 128MB RAM and their internal clock set to between September 13, 2000 and May 15, 2001.

Mac OS X 10.0 "Cheetah"

Mac OS X 10.1 "Puma"

Mac OS X 10.2 "Jaguar"

Mac OS X 10.3 "Panther"

Mac OS X 10.4 "Tiger"

Mac OS X 10.5 "Leopard"

Mac OS X 10.6 "Snow Leopard"

After Mac OS X 10.6, all Mac system installations are provided via download.

Mac OS X 10.7 "Lion"

Mac OS X 10.7.0 (Intel) (2011)
Mac OS X 10.7.1 (Intel) (2011)
Mac OS X 10.7.2 (Intel) (2011)
Mac OS X 10.7.3 (Intel) (2012)
Mac OS X 10.7.4 (Intel) (2012)
Mac OS X 10.7.5 (Intel) (2012, 2013, 2014)

Mac OS X 10.8 "Mountain Lion"

OS X 10.9 "Mavericks"

OS X 10.10 "Yosemite"

OS X 10.11 "El Capitan"

macOS 10.12 "Sierra"

macOS 10.13 "High Sierra"

macOS 10.14 "Mojave"

macOS 10.15 "Catalina"

macOS 11 "Big Sur"

macOS Big Sur preview (2020)
macOS 11.0 (roughly 2013+) (2020)
macOS 11.0.1 (roughly 2013+) (2020)
macOS 11.1 (roughly 2013+) (2020)
macOS 11.2 (roughly 2013+) (2021)
macOS 11.2.1 (roughly 2013+) (2021)
macOS 11.2.2 (roughly 2013+) (2021)
macOS 11.2.3 (roughly 2013+) (2021)
macOS 11.3 (roughly 2013+) (2021)
macOS 11.3.1 (roughly 2013+) (2021)
macOS 11.4 (roughly 2013+) (2021)
macOS 11.5 (roughly 2013+) (2021)
macOS 11.5.1 (roughly 2013+) (2021)
macOS 11.5.2 (roughly 2013+) (2021)
macOS 11.6 (roughly 2013+) (2021) — current version

macOS 12 "Monterey"

macOS Monterey preview (2021)

Cancelled projects

The following planned operating systems were cancelled before completion:

Copland (1994-1996) — developer beta was not yet in a publicly usable state
Gershwin (1994-1996) — still in planning stages with little or no actual engineering work

References

Apple Code Names, The Apple Museum. Accessed 2018-03-08.
Mac OS History Chart, MacFixer. Accessed 2018-04-07.

External links

macOS at Apple
- How to get old versions of macOS at Apple Support (2021-06-11)
- Mac OS X Mountain Lion Installer (2021-06-23)
- Mac OS X Lion Installer (2021-06-23)
Inside macOS at Apple Insider
Macintosh operating systems at Wikipedia

Classic Mac OS versions
Macintosh System Software :	System 1 · System 2 · System 3 · System 4 · System 5 · System 6 · System 7
Mac OS :	Mac OS 7.6 · Mac OS 8 · Mac OS 9 · Classic environment
Cancelled :	Copland · Gershwin
Deprecated in in May 2002 and succeeded by Mac OS X

Mac OS X / macOS versions
Mac OS X Server :	Server 1 (Rhapsody / Hera)
Mac OS X Developer Preview :	DP1 \| DP2 \| DP3 \| DP4
Mac OS X Public Beta :	Public Beta (Kodiak)
Mac OS X 10.0 (Cheetah) :	10.0.0 \| 10.0.1 \| 10.0.2 \| 10.0.3 \| 10.0.4
Mac OS X 10.1 (Puma) :	10.1.0 \| 10.1.1 \| 10.1.2 \| 10.1.3 \| 10.1.4 \| 10.1.5
Mac OS X 10.2 (Jaguar) :	10.2.0 \| 10.2.1 \| 10.2.2 \| 10.2.3 \| 10.2.4 \| 10.2.5 \| 10.2.6 \| 10.2.7 \| 10.2.8 (6R73) · 10.2.8 (G5)
Mac OS X 10.3 (Panther) :	10.3.0 \| 10.3.1 \| 10.3.2 \| 10.3.3 \| 10.3.4 \| 10.3.5 \| 10.3.6 \| 10.3.7 \| 10.3.8 \| 10.3.9
Mac OS X 10.4 (Tiger) :	10.4.0 \| 10.4.1 \| 10.4.2 \| 10.4.3 \| 10.4.4 \| 10.4.5 \| 10.4.6 \| 10.4.7 \| 10.4.8 \| 10.4.9 \| 10.4.10 \| 10.4.11
Mac OS X 10.5 (Leopard) :	10.5.0 \| 10.5.1 \| 10.5.2 \| 10.5.3 \| 10.5.4 \| 10.5.5 \| 10.5.6 \| 10.5.7 \| 10.5.8
Mac OS X 10.6 (Snow Leopard) :	10.6.0 \| 10.6.1 \| 10.6.2 \| 10.6.3 \| 10.6.4 \| 10.6.5 \| 10.6.6 \| 10.6.7 \| 10.6.8
Mac OS X 10.7 (Lion) :	10.7.0 \| 10.7.1 \| 10.7.2 \| 10.7.3 \| 10.7.4 \| 10.7.5
Mac OS X 10.8 (Mountain Lion) :	10.8.0 \| 10.8.1 \| 10.8.2 \| 10.8.3 \| 10.8.4 \| 10.8.5
OS X 10.9 (Mavericks) :	10.9.0 \| 10.9.1 \| 10.9.2 \| 10.9.3 \| 10.9.4 \| 10.9.5
OS X 10.10 (Yosemite) :	10.10.0 \| 10.10.1 \| 10.10.2 \| 10.10.3 \| 10.10.4 \| 10.10.5
OS X 10.11 (El Capitan) :	10.11.0 \| 10.11.1 \| 10.11.2 \| 10.11.3 \| 10.11.4 \| 10.11.5 \| 10.11.6
macOS 10.12 (Sierra) :	10.12.0 \| 10.12.1 \| 10.12.2 \| 10.12.3 \| 10.12.4 \| 10.12.5 \| 10.12.6
macOS 10.13 (High Sierra) :	10.13.0 \| 10.13.1 \| 10.13.2 \| 10.13.3 \| 10.13.4 \| 10.13.5 \| 10.13.6
macOS 10.14 (Mojave) :	10.14.0 \| 10.14.1 \| 10.14.2 \| 10.14.3 \| 10.14.4 \| 10.14.5 \| 10.14.6
macOS 10.15 (Catalina) :	10.15.0 \| 10.15.1 \| 10.15.2 \| 10.15.3 \| 10.15.4 \| 10.15.5 \| 10.15.6 \| 10.15.7
macOS 11 (Big Sur) :	11.0 · 11.0.1 \| 11.1 \| 11.2 · 11.2.1 · 11.2.2 · 11.2.3 \| 11.3 · 11.3.1 \| 11.4 \| 11.5 · 11.5.1 · 11.5.2 \| 11.6
macOS 12 (Monterey) :	12.0