The bootable rescue environment I reach for when systems won’t start.
With MacOS, there's something called the DFU Firmware Revive/Restore, which is a deep recovery process for unresponsive Macs. To run a DFU Revive/Restore, you have to have another Mac to update or ...
How-To Geek on MSN
How to set up a perfect rescue USB that can save any PC
Saving a PC can go from very hard to extremely easy once you set this up.
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