LM (macOS): adds support

src/detection/lm/lm_apple.m

@@ -0,0 +1,18 @@
+#include "lm.h"
+
+#import <Foundation/Foundation.h>
+
+const char* ffDetectLM(FFLMResult* result) {
+    ffStrbufSetStatic(&result->service, "loginwindow");
+    ffStrbufSetStatic(&result->prettyName, "Login Window");
+
+    NSError* error;
+    NSDictionary* dict = [NSDictionary dictionaryWithContentsOfURL:[NSURL fileURLWithPath:@"/System/Library/CoreServices/loginwindow.app/Contents/Info.plist" isDirectory:NO]
+                                                                error:&error];
+
+    if (dict) {
+        ffStrbufSetS(&result->version, ((NSString*) dict[@"CFBundleShortVersionString"]).UTF8String);
+    }
+
+    return nullptr;
+}