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Last active November 19, 2020 11:03
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On Updating to the Mac Big Sur VBox crashes on reopen, taking following steps helps resolve this issue.
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Vbox_fix.md

Fixing VirtualBox Error in latest Mac OS

Usually the issue is fixed on uninstalling the VirtualBox and reinstalling it as it re-authorizes to load kernel modules

The way I resolved - Update(6.1.10) to a newer version of VB (6.1.16)

Update to recent Version of VBox using link below

https://download.virtualbox.org/virtualbox/6.1.16/VirtualBox-6.1.16-140961-OSX.dmg

Once finished download and installation

System Preferences > Security & Privacy > General

  • Allow the App from Oracle

Start Virtual Box and if the problem persists then try following commands and restarting

sudo kextload -b org.virtualbox.kext.VBoxDrv
sudo kextload -b org.virtualbox.kext.VBoxNetFlt
sudo kextload -b org.virtualbox.kext.VBoxNetAdp
sudo kextload -b org.virtualbox.kext.VBoxUSB 
sudo /Library/Application\ Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh restart

If nothing helps then please refer to this ticket https://www.virtualbox.org/ticket/19795

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