Thousands of Apple Macs vulnerable to un-patched firmware, regardless of operating system patching levels. The security firm Duo Labs recently set out to study the security of Mac firmware, more specifically the EFI (Extensible Firmware Interface) in Macs for the past three years. Think of EFI as the modern BIOS (Basic Input / Output System) manages the boot process of a computer system as well as communications between the operating system and other devices such as video, keyboard, printers, and mice.
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