Once you install macOS Mojave Apple remove the ability to download the installers of older versions of macOS.
Previously you could go to the Mac App Store, click on the Purchased tab and see a list of all the apps they had ever downloaded. But what about if you never downloaded that version? It will not be in your Purchased section and it won’t show if your search for it!
There are a few reasons why you might want to download old versions of macOS – maybe you have software that isn’t compatible with the latest OS? Or maybe you need to run more than one version of the operating system for testing purposes.
Whatever the reason we’ve listed below links to download previous macOS versions available in the app store.
If you have questions about installing older versions of macOS software get in touch with our Service Desk on 0800 007 3040