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So, I restarted my Mac in the morning and I receive this error while trying to start my normal VBox but it did not start instead it gave in an error. This is the error image

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    Did yo perform an update of any kind (macOS and/or VirtualBox especailly)? It's also helpful if you let us know what version of VB and macOS you're using. – Allan Apr 30 '18 at 1:40
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    Its not updated This is the the Version 5.1.14 r112924 (Qt5.6.2) – k4b00m Apr 30 '18 at 2:26
  • @Allani have figured out a way from this problem but can you look at this problem = apple.stackexchange.com/questions/324154/… – k4b00m May 3 '18 at 23:02
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So, To fix this issue you will need to be in an admin account then you will need the VirtualBox .dmg file download then you will open the dmg you should see something like this Click on the VirtualBox_uninstall.tool file. Then you will see your terminal open and give you this output

Last login: Thu May  3 18:47:27 on ttys000
macname:~ user_name$ /Volumes/VirtualBox/VirtualBox_Uninstall.tool ;        exit;

Welcome to the VirtualBox uninstaller script.

The following files and directories (bundles) will be removed:
 /usr/local/bin/VirtualBox
 /usr/local/bin/VBoxManage
 /usr/local/bin/VBoxVRDP
 /usr/local/bin/VBoxHeadless
 /usr/local/bin/vboxwebsrv
 /usr/local/bin/VBoxBugReport
 /usr/local/bin/VBoxBalloonCtrl
 /usr/local/bin/VBoxAutostart
 /usr/local/bin/VBoxDTrace
 /usr/local/bin/vbox-img
 /Library/LaunchDaemons/org.virtualbox.startup.plist
 /Library/Application Support/VirtualBox/LaunchDaemons/
 /Library/Application Support/VirtualBox/VBoxDrv.kext/
 /Library/Application Support/VirtualBox/VBoxUSB.kext/
 /Library/Application Support/VirtualBox/VBoxNetFlt.kext/
 /Library/Application Support/VirtualBox/VBoxNetAdp.kext/
 /Applications/VirtualBox.app/

 And the following KEXTs will be unloaded: org.virtualbox.kext.VBoxDrv

 Do you wish to uninstall VirtualBox (Yes/No)?

type Yes

The uninstallation processes requires administrative privileges
because some of the installed files cannot be removed by a normal
user. You may be prompted for your password now...

Please enter your_id password:

Enter Your password YOU MUST ME ADMIN OR ROOT

Then Once the terminal is done uninstalling.

open the VirtualBox.dmg again and follow the steps to install it then at the end it will say installing failed or some kind of error.

Open: System Preferences > Security & Privacy . then on the bottom of that window you will see a message to allow access to the virtual box just click that and open Virtual Box you will be good to go but after this i ran into another problem which is not that improtent related to Bridge Adapter. :

Failed to open/create the internal network 'HostInterfaceNetworking-en0' VirtualBox?

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    When I read this answer I gave it a solid 1% chance of working. But it worked, bravo! You saved me a bunch of time. – ryanp102694 Jan 21 at 15:54

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