Most printer makers will tell you that you need 10.6 or higher, for example. There are still some users plodding about with even older versions of the operating system, and Snow Leopard is more or less the baseline for application and peripheral support. If you check the release notes (opens in new tab) for that security update, you'll find that the SSL/TLS bug is very specifically related to Mavericks, not Mountain Lion or Lion.Īpple keeps Snow Leopard around for a few reasons.

Neither did Lion or Mountain Lion, in fact. Keizer notes the absence of a security update for Snow Leopard and then draws the erroneous conclusion that Snow Leopard is somehow vulnerable.īut Snow Leopard didn't have that problem to begin with! Open that app from your Applications folder to begin installing the operating system.Keizer does a fancy little two-step here, conflating the recent SSL exploit discovered in iOS 7 and Mavericks with a security update released for Mountain Lion and Lion. Safari downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. macOS High Sierra can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion.macOS Mojave can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion.

macOS Catalina can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks.

macOS Big Sur can upgrade Catalina, Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks.After you download the installer from the App Store, the installer opens automatically. Safari uses these links to find the old installers in the App Store.

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