diff --git a/tools/osx/xcode_locator.m b/tools/osx/xcode_locator.m
index 71b0b1427bf2be..90c00fafcc5b74 100644
--- a/tools/osx/xcode_locator.m
+++ b/tools/osx/xcode_locator.m
@@ -177,8 +177,16 @@ static void AddEntryToDictionary(
           url, version, expandedVersion);
 
     NSURL *versionPlistUrl = [url URLByAppendingPathComponent:@"Contents/version.plist"];
-    NSDictionary *versionPlistContents = [[NSDictionary alloc] initWithContentsOfURL:versionPlistUrl
-                                                                               error:nil];
+
+    // macOS 10.13 changed the signature of initWithContentsOfURL,
+    // and deprecated the old one.
+    NSDictionary *versionPlistContents;
+#if MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_12
+    versionPlistContents = [[NSDictionary alloc] initWithContentsOfURL:versionPlistUrl error:nil];
+#else
+    versionPlistContents = [[NSDictionary alloc] initWithContentsOfURL:versionPlistUrl];
+#endif
+
     NSString *productVersion = [versionPlistContents objectForKey:@"ProductBuildVersion"];
     if (productVersion) {
       expandedVersion = [expandedVersion stringByAppendingFormat:@".%@", productVersion];