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Update macOS Installation Instruction #100

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12 changes: 11 additions & 1 deletion README.md
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Expand Up @@ -37,7 +37,17 @@ If you don't have `clang` installed or it's too old, you'll need to download and

Apple Clang doesn't come with libFuzzer, so you'll need to install a new version of LLVM from head. Follow the instructions in Installing Against New LLVM below.

#### Installing Against New LLVM
#### Using Homebrew (Recommended)
```bash
brew install llvm

# On Apple Silicon (M1/M2/M3):
CLANG_BIN="/opt/homebrew/opt/llvm/bin/clang" pip3 install atheris

# Note: If you encounter errors regarding setuptools or pybind11, try installing without build isolation:
pip3 install pybind11 setuptools && CLANG_BIN="..." pip3 install atheris --no-build-isolation
```
#### Building LLVM from Source (Fallback)

```bash
# Building LLVM
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