Fix CORE KG & K Patcher UPX Problem on macOS Sierra
Complete fix for CORE KG patches that fail on macOS Sierra and later
💡 This fix works for CORE KG patches and Special K patches that show the UPX-related error on macOS Sierra, High Sierra, and later versions.
What is This Fix?
Many cracked Mac applications use CORE KG or K Patcher as their patch mechanism. On macOS Sierra and later, these patches stopped working due to a UPX compression problem — the patcher binary cannot execute because macOS no longer allows unsigned UPX-compressed binaries to run.
This tool fixes both CORE KG and Special K Patches that display the UPX error logo and refuse to launch.
Requirements Before You Start
Make sure Xcode Command Line Tools is installed. Open Terminal and type:
xcode-select --install
A dialog will appear asking you to install the tools. Click Install and wait for it to complete. This is required — without it, the fix will not work.
Step-by-Step Fix
- Download the CORE KG fix tool using the link below
- Unzip the downloaded archive
- Open Terminal and navigate to the extracted folder
- Run the fix binary by double-clicking it or via Terminal
- Enter your Mac password if prompted
- The tool will automatically fix the UPX problem in the CORE KG patcher
- Now run the original app patch — it should work correctly
⚠️ You may need to disable SIP before running this fix. Re-enable it after you are done.
What This Fix Does
- Decompresses the UPX-packed patcher binary
- Re-signs it to be compatible with macOS Sierra security requirements
- Makes CORE KG and Special K patches executable again
- Does not modify any system files — safe to use
Still Not Working?
If the fix does not work after following the steps:
- Make sure SIP is disabled — see How to Disable SIP
- Make sure Xcode Command Line Tools are properly installed
- Try running Terminal as administrator:
sudo -sthen run the fix - Check that the app you are patching is compatible with your macOS version