Kevin Warrington

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Error: Failed to Create Host-Only Adapter

When trying to run vagrant up, received error:

There was an error while executing `VBoxManage`, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["hostonlyif", "create"]

Stderr: 0%...
Progress state: NS_ERROR_FAILURE
VBoxManage: error: Failed to create the host-only adapter
VBoxManage: error: VBoxNetAdpCtl: Error while adding new interface: failed to open /dev/vboxnetctl: No such file or directory

VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component HostNetworkInterface, interface IHostNetworkInterface
VBoxManage: error: Context: "int handleCreate(HandlerArg*, int, int*)" at line 68 of file VBoxManageHostonly.cpp

This happens because another VM is running in VirtualBox, run:

sudo /Library/StartupItems/VirtualBox/VirtualBox restart

If VirtualBox is loading on startup, remove it:

cd /Library/StartupItems
rm -r VirtualBox