Erreur VirtualBox sur MacOS Sierra

j'utilise virtualbox+vagrant pour faire tourner une machine virtuelle à des fins de développement. Ça allait parfaitement bien avant que je fasse la stupide erreur de passer à Sierra. Voici la trace:

nkohlis-MacBook-Pro:vagrant nkohli$ vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Clearing any previously set forwarded ports...
==> default: Clearing any previously set network interfaces...
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 66 of file VBoxManageHostonly.cpp

j'ai essayé l'une des solutions suggérées ailleurs:

nkohlis-MacBook-Pro:vagrant nkohli$ sudo /Library/Application Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh restart
Password:
/Applications/VirtualBox.app/Contents/MacOS/VBoxAutostart => /Applications/VirtualBox.app/Contents/MacOS/VBoxAutostart-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxBalloonCtrl => /Applications/VirtualBox.app/Contents/MacOS/VBoxBalloonCtrl-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxDD2GC.gc => /Applications/VirtualBox.app/Contents/MacOS/VBoxDD2GC.gc-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxDDGC.gc => /Applications/VirtualBox.app/Contents/MacOS/VBoxDDGC.gc-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxExtPackHelperApp => /Applications/VirtualBox.app/Contents/MacOS/VBoxExtPackHelperApp-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxHeadless => /Applications/VirtualBox.app/Contents/MacOS/VBoxHeadless-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxManage => /Applications/VirtualBox.app/Contents/MacOS/VBoxManage-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxNetAdpCtl => /Applications/VirtualBox.app/Contents/MacOS/VBoxNetAdpCtl-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxNetDHCP => /Applications/VirtualBox.app/Contents/MacOS/VBoxNetDHCP-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxNetNAT => /Applications/VirtualBox.app/Contents/MacOS/VBoxNetNAT-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxSVC => /Applications/VirtualBox.app/Contents/MacOS/VBoxSVC-amd64
/Applications/VirtualBox.app/Contents/MacOS/VBoxXPCOMIPCD => /Applications/VirtualBox.app/Contents/MacOS/VBoxXPCOMIPCD-amd64
/Applications/VirtualBox.app/Contents/MacOS/VMMGC.gc => /Applications/VirtualBox.app/Contents/MacOS/VMMGC.gc-amd64
/Applications/VirtualBox.app/Contents/MacOS/VirtualBox => /Applications/VirtualBox.app/Contents/MacOS/VirtualBox-amd64
/Applications/VirtualBox.app/Contents/MacOS/VirtualBoxVM => /Applications/VirtualBox.app/Contents/MacOS/VirtualBoxVM-amd64
/Applications/VirtualBox.app/Contents/MacOS/vboxwebsrv => /Applications/VirtualBox.app/Contents/MacOS/vboxwebsrv-amd64
Loading VBoxDrv.kext
/Library/Application Support/VirtualBox/VBoxDrv.kext failed to load - (libkern/kext) not loadable (reason unspecified); check the system/kernel logs for errors or try kextutil(8).
Error: Failed to load /Library/Application Support/VirtualBox/VBoxDrv.kext
Loading VBoxUSB.kext
/Library/Application Support/VirtualBox/VBoxUSB.kext failed to load - (libkern/kext) not loadable (reason unspecified); check the system/kernel logs for errors or try kextutil(8).
Error: Failed to load /Library/Application Support/VirtualBox/VBoxUSB.kext
Loading VBoxNetFlt.kext
/Library/Application Support/VirtualBox/VBoxNetFlt.kext failed to load - (libkern/kext) not loadable (reason unspecified); check the system/kernel logs for errors or try kextutil(8).
Error: Failed to load /Library/Application Support/VirtualBox/VBoxNetFlt.kext
Loading VBoxNetAdp.kext
/Library/Application Support/VirtualBox/VBoxNetAdp.kext failed to load - (libkern/kext) not loadable (reason unspecified); check the system/kernel logs for errors or try kextutil(8).
Error: Failed to load /Library/Application Support/VirtualBox/VBoxNetAdp.kext
(kernel) Kext org.virtualbox.kext.VBoxNetAdp not found for unload request.
Failed to unload org.virtualbox.kext.VBoxNetAdp - (libkern/kext) not found.
(kernel) Kext org.virtualbox.kext.VBoxNetFlt not found for unload request.
Failed to unload org.virtualbox.kext.VBoxNetFlt - (libkern/kext) not found.
(kernel) Kext org.virtualbox.kext.VBoxUSB not found for unload request.
Failed to unload org.virtualbox.kext.VBoxUSB - (libkern/kext) not found.
(kernel) Kext org.virtualbox.kext.VBoxDrv not found for unload request.
Failed to unload org.virtualbox.kext.VBoxDrv - (libkern/kext) not found.
Fatal error: VirtualBox

...en vain.

Voici la trace de la pile quand j'ai couru vagrant up après avoir réinstallé VirtualBox:

failed MSpanList_Insert 0x1e3000 0x215290116bd5 0x0
fatal error: MSpanList_Insert

runtime stack:
runtime.throw(0x19816b)
    /Users/mitchellh/code/3rdparty/go/src/runtime/panic.go:491 +0xad fp=0x7fff5fbff7d0 sp=0x7fff5fbff7a0
runtime.MSpanList_Insert(0x1b3988, 0x1e3000)
    /Users/mitchellh/code/3rdparty/go/src/runtime/mheap.c:692 +0x8f fp=0x7fff5fbff7f8 sp=0x7fff5fbff7d0
MHeap_FreeSpanLocked(0x1b0580, 0x1e3000, 0x100)
    /Users/mitchellh/code/3rdparty/go/src/runtime/mheap.c:583 +0x163 fp=0x7fff5fbff838 sp=0x7fff5fbff7f8
MHeap_Grow(0x1b0580, 0x8, 0x0)
    /Users/mitchellh/code/3rdparty/go/src/runtime/mheap.c:420 +0x1a8 fp=0x7fff5fbff878 sp=0x7fff5fbff838
MHeap_AllocSpanLocked(0x1b0580, 0x1, 0x0)
    /Users/mitchellh/code/3rdparty/go/src/runtime/mheap.c:298 +0x365 fp=0x7fff5fbff8b8 sp=0x7fff5fbff878
mheap_alloc(0x1b0580, 0x1, 0x12, 0x0)
    /Users/mitchellh/code/3rdparty/go/src/runtime/mheap.c:190 +0x121 fp=0x7fff5fbff8e0 sp=0x7fff5fbff8b8
runtime.MHeap_Alloc(0x1b0580, 0x1, 0x10000000012, 0x10d39)
    /Users/mitchellh/code/3rdparty/go/src/runtime/mheap.c:240 +0x66 fp=0x7fff5fbff918 sp=0x7fff5fbff8e0
MCentral_Grow(0x1b82f8, 0x0)
    /Users/mitchellh/code/3rdparty/go/src/runtime/mcentral.c:197 +0x8b fp=0x7fff5fbff980 sp=0x7fff5fbff918
runtime.MCentral_CacheSpan(0x1b82f8, 0x0)
    /Users/mitchellh/code/3rdparty/go/src/runtime/mcentral.c:85 +0x167 fp=0x7fff5fbff9b8 sp=0x7fff5fbff980
runtime.MCache_Refill(0x1df000, 0x12, 0x0)
    /Users/mitchellh/code/3rdparty/go/src/runtime/mcache.c:90 +0xa0 fp=0x7fff5fbff9e0 sp=0x7fff5fbff9b8
runtime.mcacheRefill_m()
    /Users/mitchellh/code/3rdparty/go/src/runtime/malloc.c:368 +0x57 fp=0x7fff5fbffa00 sp=0x7fff5fbff9e0
runtime.onM(0x13d650)
    /Users/mitchellh/code/3rdparty/go/src/runtime/asm_amd64.s:273 +0x9a fp=0x7fff5fbffa08 sp=0x7fff5fbffa00
runtime.mallocgc(0x120, 0xff4a0, 0x0, 0x0)
    /Users/mitchellh/code/3rdparty/go/src/runtime/malloc.go:178 +0x849 fp=0x7fff5fbffab8 sp=0x7fff5fbffa08
runtime.newobject(0xff4a0, 0x1df000)
    /Users/mitchellh/code/3rdparty/go/src/runtime/malloc.go:353 +0x49 fp=0x7fff5fbffae0 sp=0x7fff5fbffab8
runtime.newG(0x2520a)
    /Users/mitchellh/code/3rdparty/go/src/runtime/proc.go:233 +0x2a fp=0x7fff5fbffaf8 sp=0x7fff5fbffae0
allocg(0x1a33e0)
    /Users/mitchellh/code/3rdparty/go/src/runtime/proc.c:925 +0x1f fp=0x7fff5fbffb08 sp=0x7fff5fbffaf8
runtime.malg(0x8000, 0x1a3480)
    /Users/mitchellh/code/3rdparty/go/src/runtime/proc.c:2106 +0x1f fp=0x7fff5fbffb38 sp=0x7fff5fbffb08
runtime.mpreinit(0x1a3840)
    /Users/mitchellh/code/3rdparty/go/src/runtime/os_darwin.c:137 +0x27 fp=0x7fff5fbffb50 sp=0x7fff5fbffb38
mcommoninit(0x1a3840)
    /Users/mitchellh/code/3rdparty/go/src/runtime/proc.c:201 +0xc9 fp=0x7fff5fbffb78 sp=0x7fff5fbffb50
runtime.schedinit()
    /Users/mitchellh/code/3rdparty/go/src/runtime/proc.c:138 +0x55 fp=0x7fff5fbffba0 sp=0x7fff5fbffb78
runtime.rt0_go(0x7fff5fbffbd8, 0x2, 0x7fff5fbffbd8, 0x0, 0x0, 0x2, 0x7fff5fbffcd0, 0x7fff5fbffcd8, 0x0, 0x7fff5fbffcdb, ...)
    /Users/mitchellh/code/3rdparty/go/src/runtime/asm_amd64.s:95 +0x116 fp=0x7fff5fbffba8 sp=0x7fff5fbffba0

j'ai regardé mais n'ai pas trouvé de problème similaire rapporté ailleurs.

Merci.