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.For more information visit Face ID, Touch ID, passcodes, and passwords Shirley Zhang is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including recover mdf and outlook repair software products. If problems detected, this tool will inform you with an error.After that, follow onscreen wizard to run this hardware test tool.When the screen turns from black to grey, hold down “D” key until you see a progress bar.And remove all the connected devices from the Mac. At the outset, connect Mac to a power source.It can test the Mac hardware for problems. Plus, there is another internal tool – Apple Diagnostics (Apple Hardware Test on Macs built in 2013 and before). Test Hardware Issues with Apple Diagnostics You can launch it to scan disk and try to fix existing disk issues. Fortunately, Mac has an inbuilt disk repair tool – Disk Utility. Therefore, you have to attempt to repair the problems on the disk. Yet, even so, you should keep in mind that the broken EFI partition indicates Mac hard disk failure is impending. Subsequently, Mac will automatically reinstall and reboot several times until it gets recovered.Īfter reinstalling system, you will find Mac functioning properly.Later, the recovery drive will download the essential components for system re-installation on the target drive.Next, choose the target hard drive to reinstall Mac system onto.After that, you can choose “Reinstall OS X”.In the “OS X Utilities” screen, you need to connect Mac to Internet.Then, hold down “Command + R” key button during reboot until the loading screen appears.If Mac recovery partition is able to work as normal, but not the primary system, it is also a good option to reinstall system through normal recovery mode. Reinstall System with Regular Recovery Mode

Lastly, specify the destination and perform Mac system re-installation.Ģ.

When finished downloading, in the subsequent “OS X Utilities” screen, you should choose “Reinstall OS X”.

Also, there is a progress bar, which refers to that the recovery functions are being downloaded.

When a spinning globe icon appears on the screen, you have entered Internet Recovery mode.

Then, during boot, hold down “Command + Option + R” key button.But you should ensure a stable and high speed internet connection. If your Mac cannot boot up at all, you can select to reinstall system with Internet Recovery. Here we will tell what you should do in this scenario.ġ. So, it is imperative to repair this quickly. You may be afraid of data corruption, like Outlook corruption. In this case, you will be incapable of accessing your Mac data. Mac may get stuck at the startup screen with an Apple Logo and a wait cursor spinning. And system software will be unable to load as normal. Usually, at that point, Mac system will tend to fail to boot up. Many factors can cause its damage, including virus attack, bad sectors, power cut, software or hardware issues and so on. This article will give you a quick guide.Īlthough EFI partition getting corrupted is not a common occurrence, it still can occur to Mac system abruptly. You’d better resolve it as soon as possible. In a nutshell, broken EFI partition will cause lots of troubles. If the EFI partition is damaged, Mac system will malfunction in many aspects, such as system failure to boot up, etc.

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