If this start happening for new VMs with existing Vagrantfile which was working before, the problem could be with downloading the metadata for your box (e.g. Where version of VBoxGuestAdditions should match installed VirtualBox binaries.Ĭonsider also upgrading Vagrant, if was installed via Homebrew, try: brew cask updateīrew install Caskroom/cask/vagrant # Or: brew cask install Caskroom/cask/vagrant On OS X it's in /Applications/VirtualBox.app/Contents/MacOS, so the command would be: sudo wget -O /Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso If above won't help and this mismatch warning happening for all new VMs, you need to either upgrade your VirtualBox or download VBoxGuestAdditions ISO file from VirtualBox website (with the right version, so they can match) and replace it manually. Source: Issues removing and updating box additions with Virtualbox 4.3 #95 at GitHub To install it again: VAGRANT_LOG=info vagrant vbguest -do installįinally re-check by: vagrant vbguest -status. To uninstall guets addition in VM ( vagrant ssh), do the following: /opt/VirtualBoxGuestAdditions/uninstall.sh Note: Change new_version into the right one Or by installing it again in VM: vagrant vbguest -do installĪlternatively set the version which is recorded in VBox by: /Applications/VirtualBox.app/Contents/MacOS/VBoxManage guestproperty set 'new_version' /VirtualBox/GuestAdd/Version

Then try updating your guest additions by: VBoxManage guestcontrol updatega|updateguestadditions|updateadditions

Where can be found by VBoxManage list vms. Or for specific VM: VBoxManage guestproperty get /VirtualBox/GuestAdd/Version Check your host and guest version by: vagrant vbguest -status

Upgrade guest additions virtualbox