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macoslow-levelblock-device

Can't open physical disk device in macOS 10.13

I'm developing some low-level system tools that need to read the physical storage device. Prior to macOS 10.13, I was able to open /dev/disk0, /dev/disk1, etc. and read raw data from the device. But after upgrading, I'm no longer able to open these devices, and I get "Operation not permitted" errors, even though I'm running as sudo. Is there a way to access the physical drive in this version?

Solution

  • Macos10.13, must disable the SIP to access the disk0.

    1.boot into recovery

    2.execute cmdline: csrutil disable

    ref: https://www.easeus.com/mac-data-recovery-software/data-recovery-from-system-disk-under-new-macos.html