The whole directory chain has 755. I have the binary in Contents/Libs/bin/sox/sox (binary). The SoX binary is also code-signed. It is indeed being spawned in a child process (node) within Electron. As I previously mentioned, this works fine if I use the Homebrew version. const audioRecorder = spawn(soxPath, soxArgs) As an alternative, might I have a script that installs this sox binary to /opt/bin/sox? I tried to make one with pkgbuild, codesign, & xcrun. It does make SoxInstaller.pkg, but fails when I try to run it and the logs are not written (I am just guessing at the script). `#!/bin/bash Set the log file path to a specific directory LOGFILE="/tmp/sox_install.log" Redirect output to the log file exec > >(tee -a $LOGFILE) 2>&1 Start logging echo "===> Starting SoX install script at $(date)" echo "===> Log file: $LOGFILE" Ensure the script is running with elevated privileges if [ "$(id -u)" -ne 0 ]; then echo "ERROR: This script must be run as root or with sudo" exit 1 fi Define the SoX binary path SOX_BINARY="/tmp/sox" #SOX_BINARY="$(dirname "$0")/sox" echo "===> SoX binary expected at: $SOX_BINARY" Check if the SoX binary exists if [ ! -f "$SOX_BINARY" ]; then echo "ERROR: SoX binary not found at $SOX_BINARY" exit 1 else echo "===> SoX binary found." ls -l "$SOX_BINARY" fi Define the target installation directory TARGET_DIR="/opt/sox" echo "===> Target directory for SoX: $TARGET_DIR" Create target directory if it doesn't exist if [ ! -d "$TARGET_DIR" ]; then echo "===> Target directory does not exist. Attempting to create it..." sudo mkdir -p "$TARGET_DIR" if [ $? -ne 0 ]; then echo "ERROR: Failed to create target directory: $TARGET_DIR" exit 1 else echo "===> Successfully created $TARGET_DIR" fi else echo "===> Target directory already exists: $TARGET_DIR" fi Copy the SoX binary to the target directory echo "===> Copying SoX binary to $TARGET_DIR" sudo cp "$SOX_BINARY" "$TARGET_DIR/sox" if [ $? -ne 0 ]; then echo "ERROR: Failed to copy SoX binary to $TARGET_DIR" exit 1 else echo "===> SoX binary successfully copied to $TARGET_DIR" ls -l "$TARGET_DIR/sox" fi Set executable permissions for the SoX binary echo "===> Setting executable permissions for SoX" sudo chmod 755 "$TARGET_DIR/sox" if [ $? -ne 0 ]; then echo "ERROR: Failed to set permissions on $TARGET_DIR/sox" exit 1 else echo "===> Permissions successfully set for SoX binary" fi Verify SoX installation echo "===> Verifying SoX installation" if command -v "$TARGET_DIR/sox" &> /dev/null; then echo "===> SoX installation verified. SoX binary located at $TARGET_DIR/sox" else echo "ERROR: SoX installation verification failed." exit 1 fi echo "===> SoX installation complete at $(date)" exit 0`