Mac users who have updated to the latest OS version or have downloaded and implemented the most recent security update may not be as secure as they originally thought, Duo Security researchers have found.
That’s because many of them did not receive the newest firmware along with OS and software updates.
EFI firmware (Intel’s implementation of the Unified Extensible Firmware Interface – UEFI) is present on all Macs. It bridges the system’s hardware, firmware and OS together to enable it to go from power-on to booting the operating system.
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