diff --git a/contrib/apple-sdk-tools/extract_xcode.py b/contrib/apple-sdk-tools/extract_xcode.py
--- a/contrib/apple-sdk-tools/extract_xcode.py
+++ b/contrib/apple-sdk-tools/extract_xcode.py
@@ -7,6 +7,7 @@
 """
 
 import argparse
+import os.path
 import sys
 import struct
 import zlib
@@ -54,6 +55,10 @@
 
     args = parser.parse_args()
 
+    if os.path.exists(args.outfile):
+        print(f"Error: Output file {args.outfile} already exists.", file=sys.stderr)
+        sys.exit(1)
+
     with io_wrapper(args.file, "rb") as infile, io_wrapper(args.outfile, "wb") as outfile:
 
         start_offset = 0