Genymotion, “Unable to load VirtualBox engine.” on Mavericks. VBox is setup correctly
I had the same problem and solved it by running the following command: sudo /Library/StartupItems/VirtualBox/VirtualBox restart In later versions, the command is sudo /Library/Application\ Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh restart Make sure you’ve unblocked VirtualBox’s kernel extensions in System Preferences->Security and Privacy->General (You’ll get a popup when you install VirtualBox).