Boot in Recovery and the only version which the standard tools will install is Big Sur 11.4. During the course of that upgrade, the installer will update the Mac’s firmware and its Recovery system to that for Big Sur 11.4. Let’s say you were running Catalina, and upgrade it to Big Sur 11.4. Within that, the Install macOS app which performs the installation can only install that one version of macOS. This problem arises because when you install a more recent version of macOS on any Mac, the macOS installer also updates its firmware, including the Recovery system. This article suggests ways to work around that, and install the macOS of your choice. If you’ve ever tried this, you’ll surely have discovered its big snag: in Recovery you can only install one version of macOS, and that’s the latest which has been installed on that Mac, which may be the one that you don’t want. For instance, if you just installed a macOS update or upgrade which is causing problems you can’t resolve any other way. Although you might want to do that because the system has become damaged, it could be because you want to downgrade macOS. Until then, use one of the operating systems supported by HMS IT.When you boot your Mac in Recovery Mode, one of its key features is installing macOS. After Apple and app developers address bugs often accompanying major new versions, we will contact you to recommend upgrading. We strongly recommend not installing macOS Ventura, the operating system that follows Monterey. After the download is complete, the installer opens automatically. In the App Store, open the macOS Big Sur or macOS Monterey.If you have any questions before upgrading, contact your local IT support team. You can install macOS Big Sur on any of these Mac models. If your Mac is not compatible, contact your local IT support team.Īs with any major upgrade to the operating system, the update could impact some of your existing applications. Find out which version of macOS you are using by following Apple's instructions. We will continue to support macOS Big Sur and Monterey.
To maintain information security at HMS, we will no longer support macOS Catalina after October 30, 2022.
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