diff --git a/macos/Runner/Configs/Debug.xcconfig b/macos/Runner/Configs/Debug.xcconfig
index 36b0fd9..41efa7a 100644
--- a/macos/Runner/Configs/Debug.xcconfig
+++ b/macos/Runner/Configs/Debug.xcconfig
@@ -1,2 +1,10 @@
 #include "../../Flutter/Flutter-Debug.xcconfig"
 #include "Warnings.xcconfig"
+
+// Disable codesigning for local debug builds. The Repositories.nosync/
+// path on macOS sprouts extended attributes that codesign rejects with
+// "resource fork, Finder information, or similar detritus not allowed".
+// For development we don't need a signed binary.
+CODE_SIGNING_ALLOWED = NO
+CODE_SIGN_IDENTITY =
+CODE_SIGN_STYLE = Manual