diff --git a/lld/MachO/InputFiles.cpp b/lld/MachO/InputFiles.cpp
--- a/lld/MachO/InputFiles.cpp
+++ b/lld/MachO/InputFiles.cpp
@@ -139,12 +139,35 @@
   return None;
 }
 
+static bool checkSimulatedPlatform(PlatformKind lhs, PlatformKind rhs) {
+  // Mapping of platform to simulator and vice-versa.
+  static std::map<PlatformKind, PlatformKind> *platformMap = []() {
+    auto *ret = new std::map<PlatformKind, PlatformKind>();
+
+    ret->insert({PlatformKind::iOS, PlatformKind::iOSSimulator});
+    ret->insert({PlatformKind::iOSSimulator, PlatformKind::iOS});
+
+    ret->insert({PlatformKind::tvOS, PlatformKind::tvOSSimulator});
+    ret->insert({PlatformKind::tvOSSimulator, PlatformKind::tvOS});
+
+    ret->insert({PlatformKind::watchOS, PlatformKind::watchOSSimulator});
+    ret->insert({PlatformKind::watchOSSimulator, PlatformKind::watchOS});
+
+    return ret;
+  }();
+
+  auto iter = platformMap->find(lhs);
+  return iter != platformMap->end() && iter->second == rhs;
+}
+
 static bool checkCompatibility(const InputFile *input) {
   Optional<PlatformInfo> platformInfo = getPlatformInfo(input);
   if (!platformInfo)
     return true;
   // TODO: Correctly detect simulator platforms or relax this check.
-  if (config->platform() != platformInfo->target.Platform) {
+  if (config->platform() != platformInfo->target.Platform &&
+      !checkSimulatedPlatform(config->platform(),
+                              platformInfo->target.Platform)) {
     error(toString(input) + " has platform " +
           getPlatformName(platformInfo->target.Platform) +
           Twine(", which is different from target platform ") +