New versions of MacOS installers are typically available through the Mac App Store, accessed through a computer that is compatible with the latest Mac system software release.

OS X Yosemite 10.10 ( Direct download link).OS X El Capitan 10.11 ( Direct dmg download link).macOS Sierra 10.12 ( Direct DMG download link).macOS High Sierra 10.13 ( App Store link).MacOS Monterey 12 ( Direct link to InstallAssistant.pkg, App Store link).

The following links point to locations from Apple website where you can download various MacOS system software installers. This article will discuss where to download and access installers for MacOS Monterey, macOS Big Sur, macOS Catalina, MacOS Mojave, MacOS High Sierra, macOS Sierra, Mac OS X El Capitan, OS X Yosemite, OS X Mavericks, Mac OS X Mountain Lion, Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Leopard, Mac OS X Tiger, and others too. Downloading and using different Mac OS installers is very common for troubleshooting purposes, for IT staff and admins, and for tinkerers.

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