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Mac os efi boot5/12/2023 The firmware starts the Mac OS X boot loader (boot.efi). Though it is not clear which header field the source is referring to but likely related to the "bless" utility. According to HFS+ volume header fields are used to point to a "blessed file" to be loaded as an EFI application. Mac OS X extends EFI with a read-only HFS+ driver. to print all of the firmware variables.Īdditional boot arguments can be provided via the "boot-args" value. The default boot volume is stored in NVRAM and can be configured through the "Startup Disk" preference pane or the nvram command line utility. The firmware is responsible for initializing the hardware and performing a POST (Power-On Self Test).
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