Mac OS X : VirtualBox (and Vagrant) crash at startup with error NS_ERROR_FACTORY_NOT_REGISTERED (0x80040154)
I daily use Vagrant (and thus, VirtualBox) to manage a bunch a Linux VMs for my daily work. Today, i can't start Vagrant, due to a VirtualBox error. It crashes at startup with the following error : NS_ERROR_FACTORY_NOT_REGISTERED (0x80040154) Looking on the net, you'll find a load of webpages, mostly related to VirtualBox running on Linux boxen, giving obscure recipes to tweak symlinks and dealing with files permissions. Those are mostly relevant to Linux systems, and I'd advise not to apply them on your MacOS X computer. Instead:- launch Disk Utilities.app
- choose your drive on the left panel
- click on "Repair disk permissions" button
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