[Solved] Stderr: VBoxManage: error: The virtual machine 'master_default_1540967069723_95784' has terminated unexpectedly during startup with exit code 1 (0x1)

Error:-
There was an error while executing `VBoxManage`, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["startvm", "cddac55c-debe-470d-bb0a-d5badf0c19af", "--type", "gui"]

Stderr: VBoxManage: error: The virtual machine 'master_default_1540967069723_95784' has terminated unexpectedly during startup with exit code 1 (0x1)
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component MachineWrap, interface IMachine


Solution:-

1. So here is a brief of what I was doing, i installed the virtualbox on my macos using the brew and installed the vagrant than and tried to bring up the vm using vagrant which resulted in above error.

2. The problem is because the MACOS doesn't allow the changes in the kernel modules by some external application due to which the installation of the Virtualbox fails on MacOS

3. To resolve this issue download the virtualbox installer from the virtualbox site and instead of using brew to install the virtualbox use the installer.
http://download.virtualbox.org/virtualbox/5.2.20

4. Now once it fails open the Security & Privacy setting and click on allow option as below

5. Once you have clicked on allow option , try reinstalling again and you should be able to install it successfully this time.

6. Now the vagrant up and it will also work.