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The following tutorial is useful for those who already have High Sierra on their Mac but unable to upgrade to Mojave and Catalina due to hardware limitations. However, most of the Mac users can use High Sierra on their system unless it is aged. Virtualbox 6 has an inbuilt profile for installing macOS up-to High Sierra 10.13 if you have the ISO file. Install macOS Catalina 10.15 on High Sierra using VirtualBox for Mac Here is an alternative way to install macOS Catalina 10.15 on High Sierra Mac using Virtualbox. That method requires you to install macOS on a separate partition, and you will get the option to boot into Catalina from startup-screen.
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If you are one of them, we have already have a post on installing Catalina on the older Macs when it reports that it can’t be installed. People who can’t afford a new Mac for the cost and many other reasons are now left with the option to continue using High Sierra. However, the MacOS Catalina has some unique hardware requirements it can run only on Apple devices built after 2012. Apple usually gives software upgrades for the Mac hardware for a long time.
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