
If you’ve installed macOS Catalina beforehand, you can also install macOS Sierra beside it which will be installing two operating systems in a single computer. This installation is also pretty easy and we’ll shown it step by step. You can install macOS Sierra on VirtualBox on Windows on PC or laptop. VirtualBox is one of the convenient ways to install an operating system on virtual machine. If you are a Windows user, you can definitely install macOS Sierra on VirtualBox.

If you download and install macOS Sierra or any other macOS by using a bootable USB, you are actually saving your computer from damaging. You can install macOS Sierra through many methods but we highly recommend to create a bootable USB for macOS. After macOS Sierra, the upcoming version of macOS was up by the name of macOS High Sierra which is also taken from the same name.

And the name of the macOS Sierra was taken from Nevada which is a beautiful place located in Western United States in California.
