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Using OpenCore to Downgrade MacBook Pro (A2279) to Run Mojave as A1989

Description: Explore how to utilize OpenCore to emulate a MacBook Pro A1989 on your A2279 (8th Gen i5) model to enable running Mojave. This guide provides step-by-step instructions and precautions for configuring OpenCore, along with tips for reverting changes if needed.

Guide:

  1. Preparation:

    • Backup important data and create a restore point to revert changes if necessary.
    • Download the necessary tools and resources, including OpenCore bootloader and Mojave installation files.

  2. Understanding OpenCore:

    • Familiarize yourself with OpenCore bootloader and its configuration settings.
    • Refer to the official OpenCore documentation and guides for detailed information.

  3. Configuring OpenCore:

    • Create a new OpenCore configuration tailored for emulating a MacBook Pro A1989.
    • Adjust SMBIOS settings in the config.plist file to match those of a MacBook Pro A1989.
    • Customize other settings as needed, such as ACPI patches and kernel extensions.

  4. Testing and Troubleshooting:

    • Boot your MacBook Pro A2279 with the modified OpenCore configuration.
    • Monitor the boot process and check for any errors or issues.
    • Troubleshoot any problems encountered during boot, such as kernel panics or hardware compatibility issues.

  5. Verifying Compatibility:

    • Ensure that all hardware components of your MacBook Pro A2279 are compatible with macOS Mojave.
    • Check for any specific drivers or patches required to enable full functionality.

  6. Installing macOS Mojave:

    • Once the OpenCore configuration is set up, proceed with installing macOS Mojave on your MacBook Pro.
    • Follow standard installation procedures for macOS Mojave, ensuring compatibility with the emulated MacBook Pro A1989 settings.

  7. Testing and Optimization:

    • After installing Mojave, thoroughly test the system to ensure stability and functionality.
    • Optimize performance and power consumption settings as needed for the emulated MacBook Pro A1989 configuration.

  8. Reverting Changes:

    • If any issues arise or if you decide to revert to the original configuration, carefully undo the changes made to the OpenCore configuration.
    • Restore from the previously created backup or restore point to return to the original state.

  9. Community Support and Resources:

    • Engage with the Hackintosh community and forums for additional support and guidance.
    • Seek assistance from experienced users who may have encountered similar scenarios or have valuable insights.

  10. Documentation and Notes:

  • Document all configuration changes and settings for future reference.
  • Keep detailed notes of your experience and any troubleshooting steps undertaken for future troubleshooting or reference.

By following these steps and precautions, you can effectively use OpenCore to emulate a MacBook Pro A1989 on your A2279 model and run macOS Mojave, optimizing power consumption while maintaining stability and compatibility.

Using OpenCore to downgrade MBP

I need to make an A2279 (8th Gen i5) pretend it’s an A1989 (same hardware specs), in order to run Mojave. Yes, I can use Parallels, and I have it working, but I’m trying to find ways to reduce power consumption, and Parallels adds a significant load. I’d like to avoid that.

I’ve been playing with OC on this machine, but I’ve had no joy. Does anyone have a suggestion on how to set up the config to make this work, and more importantly, how to back it out if it breaks things?

I did play with OC a bit several years ago, so I’m not a complete novice.

Thanks for any ideas!

submitted by /u/ysengrimus
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