virtualbox.org

Hi everyone,

Recently I restored my Mac from TimeMachine and Virtualbox (VB) stopped working.

VB app was able to launch properly, when I tries to start my client VM, i faced the error codes below:
I tried to uninstall / reinstall VB but each time the installation failed, I'm stuck now hoping to get help from you. Please share your experience how you manage to resolve this

Try MultiOS's suggestion here: viewtopic.php?f=22&p=481332#p481332

Thank you for your suggestion, tried more than 20 times but it didn't work

@powersteer

Something you might try:

1. Uninstall VirtualBox (using the VirtualBox uninstaller script)
2. Reboot
3. In the Terminal 4. Reboot
5. Open System Preferences/Security & Privacy/General and unlock it
6. Install VirtualBox, checking System Preferences. If an Allow Oracle entry comes up, then OK it.
7. Reboot
8. Try to run a VM

I'm not sure that 7. Reboot is essential, but it can't hurt.

granada29 wrote:@powersteer

Something you might try:

1. Uninstall VirtualBox (using the VirtualBox uninstaller script)
2. Reboot
3. In the Terminal

Code: Select all

sudo kextcache --clear-staging

4. Reboot
5. Open System Preferences/Security & Privacy/General and unlock it
6. Install VirtualBox, checking System Preferences. If an Allow Oracle entry comes up, then OK it.
7. Reboot
8. Try to run a VM

I'm not sure that 7. Reboot is essential, but it can't hurt.

I have the same problem

I tried your solution ... it doesn't work for me.
What else can I do?

I am running through the above process but not sure on point 3 - is this command to be entered in recovery mode terminal, or just normal after logging into admin user?

I ran through it, running the kextcache command from user's terminal (not recovery terminal) and still can't install, "installation failed". I will try recovery terminal this time and try again

Tried both ways now. Still failing to install so assume this isn't the cause of my problem. Will try another thread for suggestions

kaowiec wrote:

granada29 wrote:@powersteer

Something you might try:

1. Uninstall VirtualBox (using the VirtualBox uninstaller script)
2. Reboot
3. In the Terminal

Code: Select all

sudo kextcache --clear-staging

4. Reboot
5. Open System Preferences/Security & Privacy/General and unlock it
6. Install VirtualBox, checking System Preferences. If an Allow Oracle entry comes up, then OK it.
7. Reboot
8. Try to run a VM

I'm not sure that 7. Reboot is essential, but it can't hurt.

I have the same problem

I tried your solution ... it doesn't work for me.
What else can I do?

OK
it works
I have to add 5a point:

5a. Change - "App Store" only

I have followed all steps incl. step 5a (asi would not get the prompt to allow oracle in system preferences without it), but still i cannot start my windows VM on mac host. The error remains the same no matter if i try to start an existing VM or start a new one from scratch. Any ideas?

Thank you for sharing, tried the steps you've shared religiously but unfortunately installation still failed at #6
Tried using step 5a from @kaowlec but it's still the same

I'm getting desperate

granada29 wrote:@powersteer

Something you might try:

1. Uninstall VirtualBox (using the VirtualBox uninstaller script)
2. Reboot
3. In the Terminal

Code: Select all

sudo kextcache --clear-staging

4. Reboot
5. Open System Preferences/Security & Privacy/General and unlock it
6. Install VirtualBox, checking System Preferences. If an Allow Oracle entry comes up, then OK it.
7. Reboot
8. Try to run a VM

I'm not sure that 7. Reboot is essential, but it can't hurt.

For those who face the issue with the failed installation after the step 7, reboot your mac and run the installation again. It will finish without issues and you will start your machines.