![os x virtual machine file os x virtual machine file](https://i.imgur.com/9rYK7rX.png)
Make sure you allow enough disk space inside the temp VM: apart from the requirements of the OS it is running, the "Install OS X El Capitan" application is about 6.3 GB (plus the size of the disk image if you copy it into the VM).
![os x virtual machine file os x virtual machine file](https://www.parallels.com/blogs/app/uploads/2017/02/Fig-1_Install-Sierra-customer-release-in-a-VM.png)
The reason this works is that the installer package on the disk image and the actual macOS installer bypass the model check if they detect they are running inside a VM. Once you have the Mojave VM, you can open the El Captain "InstallMacOSX.dmg" file from inside that VM and run the installer, which creates the "Install OS X El Capitan" application, copy that application out to the host then use it to create your El Capitan VM (and delete the temp Mojave VM if you don't need it for anything else). You can download the Mojave installer from Apple's support page (it comes as an application, not a disk image, so it can be used directly to create the Mojave VM). If you don't have access to a suitable older Mac model, the workaround is to create a temporary VM for a later macOS which your Mac is able to run, e.g. If your iMac is a 2017 or later model, then it is too new to run El Capitan, so the installer package inside the disk image will refuse to proceed. The catch is that you can only do this on a Mac which is able to boot El Capitan. It is a free virtual machine app that app developers can use for testing apps on multiple operating systems. That application is the file you need to create an El Capitan VM. Virtual Box is a free VM app that supports high-performance virtualization. dmg in macOS and run the installer package inside it, which will create an "Install OS X El Capitan" application in your Applications folder. Download macOS Big Sur ISO for VirtualBox & VMware (direct link) Users download the macOS Big Sur ISO file to create a bootable USB drive.
Os x virtual machine file install#
Try MacOS on your Windows PC, or install Windows apps on your Mac PC. The key detail is that you can't use that InstallMacOSX.dmg file to create a VM. VirtualBox is a free virtualization program that allows you to run any OS on your computer by downloading a virtual machine. This problem has come up before and I gave a more detailed answer at the time.