Hackbgrt-1.5.1

HackBGRT 1.5.1 is a specialized utility designed to customize the boot logo on Windows systems using UEFI firmware. By modifying the Boot Graphics Resource Table (BGRT), it allows users to replace the standard manufacturer or Windows logo with a custom image during the startup process. Core Functionality

UEFI-Based Modification: Unlike older tools that patched system files, HackBGRT works by injecting a custom driver into the UEFI boot sequence.

Resolution Independence: In version 1.5.x, image coordinates are typically relative to the center of the screen, improving compatibility across different monitor resolutions.

Automatic Setup: The setup.exe simplifies the process by mounting the EFI system partition, copying necessary files, and updating the boot loader. Installation Prerequisites

UEFI Mode: Your system must be booting in UEFI mode; Legacy BIOS is not supported.

Disable Secure Boot: This is a mandatory step. Since HackBGRT uses an unsigned boot loader, the system will block it if Secure Boot is enabled.

Single Drive Safety: For the most reliable automatic setup, it is recommended to have only one bootable drive connected during installation. Step-by-Step Usage Hackbgrt-1.5.1

Download: Always obtain the latest version from the Official GitHub Releases. Configuration: Run setup.exe.

The tool usually opens Microsoft Paint or your default editor to let you create/paste your custom .bmp or .png logo.

For advanced users, config.txt can be edited to adjust image positioning or weight.

Implementation: Follow the on-screen prompts to install the boot loader. Reboot: Restart your computer to verify the change. Critical Risks and Troubleshooting

Boot Failure: Modifying the boot sequence carries inherent risks. Some users have reported being unable to boot into Windows after a failed configuration.

Recovery: If the system fails to boot, you may need to use Windows Startup Repair or manually delete the HackBGRT files from the EFI partition via a recovery command prompt. HackBGRT 1

Windows Updates: Occasionally, major Windows updates may overwrite the boot loader. If the original logo reappears, simply rerun the HackBGRT installer. If you'd like to proceed, let me know:

What is your motherboard/laptop model? (I can help you find the Secure Boot settings). Do you have a Windows recovery drive ready just in case?

Are you looking to use a specific image or just testing the tool? HackBGRT - Windows boot logo changer for UEFI systems

Installation Steps

Step 1: Prepare Your Custom Logo

• Create a BMP file. For example: my_logo.bmp.
• Resolution: Match your display’s native resolution (e.g., 1920x1080).
• Color depth: 24-bit (true color) or 32-bit with alpha (if supported by your firmware).
• Name it bootlogo.bmp for simplicity.

Step 2: Locate Your OpenCore EFI Partition

• Mount your EFI partition (using diskutil on macOS, mounting tools on Windows/Linux).
• Navigate to EFI/OC/ directory.

Step 3: Place the Hackbgrt Driver

• Copy Hackbgrt-1.5.1.efi into EFI/OC/Drivers/.

Step 4: Place the Custom Logo

• Create a folder EFI/OC/Resources/Image/ if it doesn’t exist.
• Copy your bootlogo.bmp into that folder.

Step 5: Edit config.plist

• Open your OpenCore config.plist with ProperTree, OCAuxiliaryTools, or a text editor.
• Under UEFI -> Drivers, add an entry:
  • Path: Hackbgrt-1.5.1.efi
  • Enabled: True
• Under Misc -> Boot:
  • Set PickerVariant to Default (or leave blank).
  • Set UIScale to 2 (for 4K displays) or 1 (for 1080p).
• Under UEFI -> Output:
  • Ensure ClearScreenOnModeSwitch is set to False (to avoid flicker).

Step 6: Save and Reboot

• Save config.plist.
• Reboot your system.
• Watch the magic: your custom, high-resolution logo will appear during early boot, replacing the old pixelated one.

Issue: Logo shows but distorted or skewed

Cause: Resolution mismatch. Confirm your BMP resolution is exactly your screen’s native resolution. Some laptops report a different GOP (Graphics Output Protocol) resolution. Try forcing UIScale=2 or enabling ForceBGRT=True in your UEFI section.

Use Cases: Who Needs Hackbgrt-1.5.1?

1. Hackintosh Builders

The most common user base. macOS is particularly sensitive to BGRT quality. A pixelated Apple logo during boot ruins the "real Mac" illusion. Hackbgrt-1.5.1 lets Hackintosh users display a perfect, retina-quality Apple logo.

Version 1.5.1: What’s New and Improved?

The 1.5.1 release is not a major rewrite but a critical stability and compatibility update. Previous versions (1.4.x and early 1.5.0) had known issues with certain UEFI implementations, particularly on laptops with hybrid graphics or systems running the latest versions of Windows 11 and macOS Sonoma/Ventura. Installation Steps Step 1: Prepare Your Custom Logo

Key improvements in Hackbgrt-1.5.1 include:

1. Enhanced ACPI Patching Logic – The driver now more reliably locates the BGRT table even on motherboards with non-standard UEFI implementations (e.g., some MSI and Gigabyte boards).
2. Resolution Scaling Fixes – Fixed a bug where 4K displays would sometimes default to 1080p logo scaling.
3. Memory Leak Patch – Previous versions had a minor memory leak during the handoff from bootloader to OS kernel. Version 1.5.1 resolves this, ensuring no runtime impact.
4. Better OpenCore Integration – Improved compatibility with OpenCore 0.9.5 and newer, including proper handling of ForceBGRT and UIScale parameters.