I already tried rebooting, uninstalling the previous version and re-installing, etc. Nothing of this helped.Failed to load /Library/Application Support/VirtualBox/VBoxDrv.kext - (libkern/kext) kext (kmod) start/stop routine failed.
And when looking at the system log, I see this:
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default 16:08:32.914765 +0100 kernel.development AssertLogRel /Users/vbox/tinderbox/mac-rel/src/VBox/Runtime/r0drv/darwin/dbgkrnlinfo-r0drv-darwin.cpp(390) int rtR0DbgKrnlDarwinCheckStandardSymbols(RTDBGKRNLINFOINT *): <NULL>
default 16:08:32.914774 +0100 kernel.development IOMalloc (ffffff800b8431d0 != ffffff800b7baad0)
default 16:08:32.915756 +0100 kernel.development AssertLogRel /Users/vbox/tinderbox/mac-rel/src/VBox/Runtime/r0drv/darwin/dbgkrnlinfo-r0drv-darwin.cpp(390) int rtR0DbgKrnlDarwinCheckStandardSymbols(RTDBGKRNLINFOINT *): <NULL>
default 16:08:32.915762 +0100 kernel.development IOMalloc (ffffff800b8431d0 != ffffff800b7baad0)
default 16:08:32.915956 +0100 kernel.development VBoxDrv: Failed to open kernel symbols, rc=-226
default 16:08:32.915966 +0100 kernel.development Kext org.virtualbox.kext.VBoxDrv start failed (result 0x5).
default 16:08:32.915973 +0100 kernel.development Kext org.virtualbox.kext.VBoxDrv failed to load (0xdc008017).
default 16:08:32.915977 +0100 kernel.development Failed to load kext org.virtualbox.kext.VBoxDrv (error 0xdc008017).
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> sudo kextutil -t -v 6 /Library/Application\ Support/VirtualBox/VBoxDrv.kext
Loading /Library/Application Support/VirtualBox/VBoxDrv.kext.
(kernel) User-space log flags changed from 0x0 to 0xfff.
(kernel) Received kext load request from user space.
(kernel) Received request from user space to load kext org.virtualbox.kext.VBoxDrv.
(kernel) Loading kext org.virtualbox.kext.VBoxDrv.
(kernel) Kext com.apple.kpi.libkern is already loaded.
(kernel) Kext com.apple.kpi.unsupported is already loaded.
(kernel) Kext com.apple.kpi.iokit is already loaded.
(kernel) Kext com.apple.kpi.mach is already loaded.
(kernel) Kext com.apple.kpi.bsd is already loaded.
(kernel) Allocated link buffer for kext org.virtualbox.kext.VBoxDrv at 0xffffff7f8ebff000 (978944 bytes).
(kernel) Kext org.virtualbox.kext.VBoxDrv executable loaded; 239 pages at 0xffffff7f83dff000 (load tag 206).
(kernel) Kext org.virtualbox.kext.VBoxDrv calling module start function.
(kernel) Kext org.virtualbox.kext.VBoxDrv registered class org_virtualbox_SupDrv.
(kernel) Kext org.virtualbox.kext.VBoxDrv has IOService subclass org_virtualbox_SupDrv; enabling autounload.
(kernel) Kext org.virtualbox.kext.VBoxDrv registered class org_virtualbox_SupDrvClient.
(kernel) Kext org.virtualbox.kext.VBoxDrv did not start (return code 0x5).
(kernel) Kext org.virtualbox.kext.VBoxDrv start failed (result 0x5).
(kernel) Kext org.virtualbox.kext.VBoxDrv failed to load (0xdc008017).
(kernel) Failed to load kext org.virtualbox.kext.VBoxDrv (error 0xdc008017).
(kernel) Kext org.virtualbox.kext.VBoxDrv unloading.