TLDR
In this article we are gonna cover the main issues that arise when installing Virtual Box on a Mac OS. Let's assume that you already have the ISO image of the OS that you pretend to run on the virtual machine, so that we can focus on fixing virtual box issue. If you have recently installed Virtual Box, you might be ready to go, or not. If you still have any issues, try to reboot your computer before attempting to install Virtual Box again (after running the uninstall script)via the TL;DR App
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