If you try to install VirtualBox on macOS, and you got the error “The Installation failed.” !!!
Try this Solution :
- Desktop, top menu, clicks Apple icon -> System Preferences
- Clicks on the Security and Privacy icon.
- Clicks on the left-bottom lock icon, type password to unlock it.
- Clicks on the allow button for this statement. System software from developer “Oracle America, Inc” was block from loading
- Done, restart the macOS.
- Try to reinstall the VirtualBox again; this time should succeed.