IE 11 VM Steps

IE 11 install:
==============
$ curl -s https://raw.githubusercontent.com/xdissent/ievms/master/ievms.sh | env IEVMS_VERSIONS="11" bash

Error:
=====
Do you agree to these license terms and conditions (y/n)? y
Installation of "Oracle VM VirtualBox Extension Pack" aborted.
\nERROR: Failed to install Oracle VM VirtualBox Extension Pack from /Users/$user/.ievms/Oracle_VM_VirtualBox_Extension_Pack-5.1.30.vbox-extpack, error code (1)\n

Resolution: 
==========
$ VBoxManage extpack install /Users/$user/.ievms/Oracle_VM_VirtualBox_Extension_Pack-5.1.30.vbox-extpack

Error:
=====
progress state: NS_ERROR_FAILURE
VBoxManage: error: Failed to install "/Users/$user/.ievms/Oracle_VM_VirtualBox_Extension_Pack-5.1.30.vbox-extpack"
VBoxManage: error: Extension pack 'Oracle VM VirtualBox Extension Pack' is already installed. In case of a reinstallation, please uninstall it first
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component ExtPackManagerWrap, interface IExtPackManager
VBoxManage: error: Context: "RTEXITCODE handleExtPack(HandlerArg *)" at line 1201 of file VBoxManageMisc.cpp

Resolution: 
===========
Re-install the Virtual Box extension pack:

$ VBoxManage extpack uninstall /Users/$user/.ievms/Oracle_VM_VirtualBox_Extension_Pack-5.1.30.vbox-extpack
$ VBoxManage extpack install /Users/$user/.ievms/Oracle_VM_VirtualBox_Extension_Pack-5.1.30.vbox-extpack

IE 11 install (attempt 2):
==========================
$ curl -s https://raw.githubusercontent.com/xdissent/ievms/master/ievms.sh | env IEVMS_VERSIONS="11" bash

Error: 
=====
Progress state: VBOX_E_FILE_ERROR
VBoxManage: error: Appliance import failed
VBoxManage: error: Could not create the imported medium '/Users/kgarfinkel/.ievms/IE11 - Win7-disk1.vmdk'.
VBoxManage: error: VMDK: could not create new file '/Users/kgarfinkel/.ievms/IE11 - Win7-disk1.vmdk' (VERR_ALREADY_EXISTS)
VBoxManage: error: Details: code VBOX_E_FILE_ERROR (0x80bb0004), component ApplianceWrap, interface IAppliance
VBoxManage: error: Context: "RTEXITCODE handleImportAppliance(HandlerArg *)" at line 886 of file VBoxManageAppliance.cpp

Resolution: 
==========
$ rm -rf ~/.ievms
$ rm -rf ~/VirtualBox\ VMs/IE*

IE 11 install (attempt 3):
==========================

Error: 
=====
MD5 check failed for unar1.10.1.zip (wanted d548661e4b6c33512074df81e39ed874, got bafc9f7653a793dd412268cec180f54d)

Resolution: 
==========
$ brew install unar

IE 11 install (attempt 4):
==========================
$ curl -s https://raw.githubusercontent.com/xdissent/ievms/master/ievms.sh | env IEVMS_VERSIONS="11" bash