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With No Security, other operating systems can be installed.Intel Hackintosh Discord: AMD Hackintosh Discord: Rules Medium Security still validates that a legitimate version of macOS (or Windows) is installed, but doesn’t check macOS for signs of modification. (This mode also allows Windows via Boot Camp.) If that can’t be validated, it will offer to reinstall macOS (but not erase your data) or startup from a different drive, depending on your other settings. It also validates effectively that the installed version of macOS hasn’t been tampered with. In Full Security mode, Secure Boot uses cryptographic verification through digital certificates and signatures to allow only the currently installed version of macOS or a version that Apple marks as currently supported. However, that concern aside, it’s also a significant security enhancement in an era when we’ve seen exactly how insidious criminal and government-issued malware can be. The third option, Secure Boot, is the kind of feature that raises the hackles of long-time Mac users, as it can feed the concern that Apple will eventually make Macs as locked-down as iOS in terms of what versions of macOS can run and which apps could thus run on your Mac.

(The iMac’s internal drive is now deeply integrated with the T2 chip, making it useless if removed without the chip, and the chip can’t be removed.) Security minded people might prefer this option, as it prevents a malicious party from booting your Mac to try to access, copy, or decrypt material on your internal drive. You can limit whether or not to let your iMac Pro start up from externally connected drives of any kind. It prevents someone without your firmware password from starting up from a disk other than the currently designated startup volume.Įxternal Boot. This already exists as Utilities > Firmware Password Utility on other Macs. Two of the three options are quick to explain:įirmware Password Protection.

Disable mac secure boot