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.
Older versions of Mac OS X installers can often be downloaded as well, but from different sources. Mac users can download the latest macOS installer available from the Terminal by using the following command string:. You can also download specific installer versions by using the following syntax, replacing the asterisks with version number:. This approach for re-downloading older OS X installers from App Store Purchases section works for obtaining many older versions of Mac OS X, particularly if the machine doing the downloading is running an older Mac release too.
For buying even older versions of Mac OS X, you may have some luck searching on Amazon or Ebay and buying old physical copies of the installer disks. Safari uses these links to find the old installers in the App Store. After downloading from the App Store, the installer opens automatically. Safari downloads the following older installers as a disk image named InstallOS. Open the disk image, then open the. It installs an app named Install [ Version Name ].
Open that app from your Applications folder to begin installing the operating system. Check compatibility The version of macOS that came with your Mac is the earliest version it can use. It installs an app named Install [ Version Name ]. Open that app from your Applications folder to begin installing the operating system.
Check compatibility The version of macOS that came with your Mac is the earliest version it can use. To confirm compatibility before downloading, check the minimum hardware requirements: macOS Big Sur 11 hardware requirements macOS Catalina Published Date: October 25, Yes No.
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