If you set "User Script Sandboxing" to "No" in the Build Settings and register the following script in the "Run Script" phase of Build Phases, the simulator will no longer crash in either Xcode 26 or Xcode 16.4. if [ "$PLATFORM_DISPLAY_NAME" = "iOS Simulator" ]; then KEYWORD="iOS ${TARGET_DEVICE_OS_VERSION}" DYLD_FALLBACK_FRAMEWORK_PATH=$(xcrun simctl list devices -v | grep "$KEYWORD" | awk -F'[][]' '{print $2}') DYLD_FALLBACK_FRAMEWORK_PATH="${DYLD_FALLBACK_FRAMEWORK_PATH}/Contents/Resources/RuntimeRoot/System/Cryptexes/OS/usr/lib/swift/" LIBRARY_FILE="libswiftWebKit.dylib" ln -sf "${DYLD_FALLBACK_FRAMEWORK_PATH}/${LIBRARY_FILE}" "${BUILT_PRODUCTS_DIR}/${LIBRARY_FILE}" echo "👉Created an alias for ${LIBRARY_FILE}" fi