![]() However, an attacker with physical access to the Mac could potentially use hardware to attach to the firmware storage chip and update the chip to contain malicious content. To help prevent rollback attacks, updates must always have a version newer than the existing one. ![]() UEFI firmware updates are digitally signed by Apple and verified by the firmware before updating the storage. The UEFI firmware was the first code to execute on the Intel chip.įor an Intel-based Mac without the Apple T2 Security Chip, the root of trust for the UEFI firmware is the chip where the firmware is stored. This section refers to the Intel firmware as the UEFI firmware. EDK2-based code conforms to the Unified Extensible Firmware Interface (UEFI) specification. Since 2006, Mac computers with an Intel-based CPU use an Intel firmware based on the Extensible Firmware Interface (EFI) Development Kit (EDK) version 1 or version 2. iPhone Text Message Forwarding security.How iMessage sends and receives messages.Adding transit and eMoney cards to Apple Wallet.Rendering cards unusable with Apple Pay.Adding credit or debit cards to Apple Pay.How Apple Pay keeps users’ purchases protected.Intro to app security for iOS and iPadOS.Protecting access to user’s health data.How Apple protects users’ personal data.Activating data connections securely in iOS and iPadOS.Protecting user data in the face of attack.Protecting keys in alternate boot modes.Encryption and Data Protection overview.UEFI firmware security in an Intel-based Mac.Additional macOS system security capabilities.recoveryOS and diagnostics environments.Contents of a LocalPolicy file for a Mac with Apple silicon.LocalPolicy signing-key creation and management.Boot process for iOS and iPadOS devices.Secure intent and connections to the Secure Enclave.Face ID, Touch ID, passcodes, and passwords.So, if you want to make modifications to your motherboard image, downloading UEFITool is one of the best ways to do so. ![]() Also, some motherboard images are encrypted, in which case UEFITool won't be able to open them. ![]() The tool on which UEFITool is based is somewhat old, so some motherboard firmware may not work. However, it's important to know what you're modifying, because if you flash an incorrectly modified file, you may be left without a motherboard or be forced to run recovery mode to flash an original firmware from scratch. With UEFITool, you can open your motherboard's update file to check its structure, verify its integrity before flashing it, or, most importantly, make modifications to the image. This offers a greater number of settings on the motherboard, as well as other improvements, such as using a mouse to navigate its menus. With it, you can access all of the code behind your motherboard's image in hexadecimal, as well as make modifications to it.Īlthough motherboard images are commonly called BIOS, most computers today use UEFI, which stands for Unified Extensible Firmware Interface. UEFITool is a program for viewing and editing BIOS and UEFI installation files.
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