Copy the resulting "Install Mac OS Sierra.app" from the VM's Applications folder to the host.Ĩ. The model compatibility check is bypassed if it detects it is running inside a VM.ħ. Inside the VM, open the disk image and the installer package, proceed with installation. Inside the VM, download the disk image for macOS Sierra (or copy it from the host to the VM, if you already downloaded it).Ħ. Install VMware Tools so you can easily copy files between the host and VM.ĥ. Boot into that VM and do minimal setup.Ĥ. It will need a minimum of 20 GB of disk space (possibly more for recent macOS versions).ģ. Create a virtual machine using the newer macOS version. Download the installer for a newer version of macOS which does support your Mac model.Ģ. If you don't have easy access to an older Mac, there is a workaround involving virtual machines.ġ. You won't be able to do this if your Mac is too new, because the installer package checks the Mac model is supported by the macOS version you are trying to install.
Opening that package and running through the installer creates the "Install macOS version.app" application in the Applications folder. When you open that you will find it contains an installer package. It won't let you download the installer if your Mac model is too new to run that macOS version.įor Sierra (10.12) and earlier, the link downloads a Disk Image (.dmg) file. Your 2018 MacBook Pro is too new (its oldest supported macOS is High Sierra 10.13.6).Īs a starting point, this is the page where Apple provides access to the installers for older macOS versions:įor High Sierra (10.13) and later, the link on that page takes you to a hidden App Store page from where you can download the macOS installer. Unfortunately they don't make this easy: you need a Mac which able to boot Sierra in order to get the installer. There was a security certificate expiry a couple of years ago which killed all previously downloaded macOS installers.ĭownload a fresh copy of the macOS Sierra installer from Apple and try again. The most likely problem: if you don't remember where you got the macOS 10.12 installer, that might mean you got it long enough ago that it no longer works.
Just to check: are you running Fusion 12? Older Fusion versions won't work on macOS Monterey.
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