i have a macbook pro A1278, installed Monterey OS via OpenCore patcher, it is good working but my memory show only 1/2 from physical memory amount, why? and how to make it correctly?

There are a few possible reasons why your MacBook Pro A1278 with Monterey OS installed via OpenCore patcher is only showing half of its physical memory. Here are some troubleshooting steps you can try:

1. Check System Information:

  • OpenĀ Apple Menu > About This Mac > System Report.
  • Click on “Memory” in the left sidebar.

This will confirm if the system is indeed recognizing only half of the memory. Make sure you’re looking at the “Physical Memory” section, not the “App Memory” section.

2. Verify OpenCore Patcher Configuration:

  • Consult the specific guide or documentation you used for OpenCore patching on your A1278 model. There might be specific configuration steps related to memory recognition.
  • Double-check that your OpenCore configuration (config.plist) is set up correctly for your model and memory configuration.

3. SMC and NVRAM Reset:

  • Sometimes a reset of the System Management Controller (SMC) and Non-Volatile Random-Access Memory (NVRAM) can resolve memory recognition issues.
  • Search online for the specific key combinations to reset SMC and NVRAM for your MacBook Pro A1278 model.

4. Hardware Issues:

  • If the above steps don’t resolve the issue, there’s a possibility of a hardware problem with the memory itself.
  • Booting into Apple Diagnostics (hold down Option + D during startup) might provide some clues about potential hardware faults. However, this might not be as comprehensive for patched systems.

Important Considerations:

  • Using OpenCore Patcher to install Monterey OS on unsupported hardware is not officially supported by Apple and can introduce compatibility issues.
  • Troubleshooting problems arising from such modifications can be complex and might require advanced knowledge.


  • If you’re not comfortable troubleshooting these issues yourself, consider seeking help from a professional technician experienced with OpenCore patching.
  • You might also want to weigh the benefits of using Monterey OS on an unsupported machine against the potential risks and limitations, including potential hardware incompatibility.

If none of these solutions work, it’s recommended to search online forums or communities specifically focused on OpenCore patching for your A1278 model. These communities might have solutions or workarounds for known memory recognition issues with your specific configuration. Remember, modifying your system with tools like OpenCore Patcher carries some inherent risks, so proceed with caution and at your own responsibility.