Here is a list of links to different pages and articles on Low End Mac about the various different operating systems which ran on Macs.

/Software Tech Specs > macOS Index

80s Mac OS

• System 1.0
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• System 2.0 (To be added)
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• System 3.0 (To be added)
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• System 4.0 (To be added)
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• System 5 (To be added)
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Late 80s / Early 90s

• System 6
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90s Mac OS

• System 7
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• Mac OS 7.5 – 7.6
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• Mac OS 8
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• Mac OS 9
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• Articles:
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  • A brief history of Mac OS
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  • Mac OS 9 Isn’t dead yet
    .
  • Mac OS 9 is Still Alive and Kicking.. and That’s Not a Bad Thing
    .

Mac OS X

• Mac OS X 10.0 Cheetah
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• Mac OS X 10.1 Puma
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• Mac OS X 10.2 Jaguar
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• Mac OS X 10.3 Panther
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• Mac OS X 10.4 Tiger
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• Mac OS X 10.5 Leopard
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• Mac OS X 10.6 – 10.6.8 Snow Leopard for PowerPC
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Mac OS X (Intel)

• Mac OS X 10.6 Snow Leopard
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• Mac OS X 10.7 Lion
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OS X (Intel)

• OS X 10.8 Mountain Lion
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• OS X 10.9 Mavericks
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• OS X 10.10 Yosemite
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• OS X 10.11 El Capitan
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macOS (Intel)

• macOS Sierra 10.12
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• macOS High Sierra 10.13 (To be added)
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• macOS Mojave 10.14
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• macOS Catalina 10.15
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Modern macOS

• macOS 11.0 Big Sur
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• macOS 12.0 Monterey
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• macOS 13.0 Ventura
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• macOS 14.0 Sonoma
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• macOS 15.0 Sequoia
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• macOS 26.0 Tahoe
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  • Developer Beta 1 – Build 25A5279m
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  • Developer Beta 2 – Build 25A5295e
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  • Developer Beta 3 – Build 25A5306g
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  • Developer Beta 4 – Build 25A5316i
    .

Other Mac Articles

• macOS Versions Throughout The Years, 2025 Edition