[omochi@omochi-iMacPro wasm]$ sil-opt Killed: 9 [omochi@omochi-iMacPro wasm]$ xattr sil-opt xattr: No such file: sil-opt [omochi@omochi-iMacPro wasm]$ which sil-opt /Users/omochi/swift/swift-wasm-DEVELOPMENT-SNAPSHOT-2020-10-05-a/usr/bin/sil-opt [omochi@omochi-iMacPro wasm]$ xattr $(which sil-opt) com.apple.quarantine [omochi@omochi-iMacPro wasm]$ sudo xattr -r -d com.apple.quarantine $(which sil-opt) Password: [omochi@omochi-iMacPro wasm]$ sil-opt --version LLVM (http://llvm.org/): LLVM version 10.0.0 Optimized build. Default target: x86_64-apple-darwin19.6.0 Host CPU: skylake-avx512