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If you attempt to load the kernel extension (KEXT) without approval, you’ll encounter the VirtualBox Kernel Driver Not Installed error message. 

Put the macOS Monterey installer on an external USB thumb drive or hard drive and use it to install the operating system on a Mac.

Your Mac is failing to boot up properly due to some unknown glitch, so there’s no way to access the operating system or even get your data off the hard drive. A bootable USB drive, which contains a copy of the operating system, can save the day. This will allow you to check your drive for errors, restore a recent Time Machine backup, and—if the drive is still physically working—reinstall the operating system to give it a fresh start. First, you will need a USB flash drive or external hard drive formatted as Mac OS Extended, with at least 14GB of available space. You also need a download...

M1 Macs have another hidden boot mode However sparse Apple’s documentation might have become, when it does explain things properly, it’s amazing what’s revealed in the detail. One document every serious Mac user should read and refer to repeatedly is the Platform Security Guide, which Apple has just revised to give all the gory details of how M1 Macs start up. In the course of doing that, it reveals that these new models have a boot mode which doesn’t appear to be documented anywhere else, but which could prove a Mac-saver: Fallback Recovery OS. If you need your M1 Mac to enter 1 Tru...