diff --git a/AFNetworking/AFURLSessionManager.h b/AFNetworking/AFURLSessionManager.h
index 99e167a54b..816c02d9aa 100644
--- a/AFNetworking/AFURLSessionManager.h
+++ b/AFNetworking/AFURLSessionManager.h
@@ -383,8 +383,9 @@ NS_ASSUME_NONNULL_BEGIN
 
  @param block A block object to be executed when a session task is completed. The block has no return value, and takes three arguments: the session, the task, and any metrics that were collected in the process of executing the task.
  */
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
 - (void)setTaskDidFinishCollectingMetricsBlock:(nullable void (^)(NSURLSession *session, NSURLSessionTask *task, NSURLSessionTaskMetrics * _Nullable metrics))block;
-
+#endif
 ///-------------------------------------------
 /// @name Setting Data Task Delegate Callbacks
 ///-------------------------------------------
diff --git a/AFNetworking/AFURLSessionManager.m b/AFNetworking/AFURLSessionManager.m
index cd0fdf7f97..6669b3c0be 100644
--- a/AFNetworking/AFURLSessionManager.m
+++ b/AFNetworking/AFURLSessionManager.m
@@ -98,7 +98,9 @@ static dispatch_group_t url_session_manager_completion_group() {
 typedef NSInputStream * (^AFURLSessionTaskNeedNewBodyStreamBlock)(NSURLSession *session, NSURLSessionTask *task);
 typedef void (^AFURLSessionTaskDidSendBodyDataBlock)(NSURLSession *session, NSURLSessionTask *task, int64_t bytesSent, int64_t totalBytesSent, int64_t totalBytesExpectedToSend);
 typedef void (^AFURLSessionTaskDidCompleteBlock)(NSURLSession *session, NSURLSessionTask *task, NSError *error);
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
 typedef void (^AFURLSessionTaskDidFinishCollectingMetricsBlock)(NSURLSession *session, NSURLSessionTask *task, NSURLSessionTaskMetrics * metrics);
+#endif
 
 typedef NSURLSessionResponseDisposition (^AFURLSessionDataTaskDidReceiveResponseBlock)(NSURLSession *session, NSURLSessionDataTask *dataTask, NSURLResponse *response);
 typedef void (^AFURLSessionDataTaskDidBecomeDownloadTaskBlock)(NSURLSession *session, NSURLSessionDataTask *dataTask, NSURLSessionDownloadTask *downloadTask);
@@ -122,7 +124,9 @@ - (instancetype)initWithTask:(NSURLSessionTask *)task;
 @property (nonatomic, strong) NSProgress *uploadProgress;
 @property (nonatomic, strong) NSProgress *downloadProgress;
 @property (nonatomic, copy) NSURL *downloadFileURL;
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
 @property (nonatomic, strong) NSURLSessionTaskMetrics *sessionTaskMetrics;
+#endif
 @property (nonatomic, copy) AFURLSessionDownloadTaskDidFinishDownloadingBlock downloadTaskDidFinishDownloading;
 @property (nonatomic, copy) AFURLSessionTaskProgressBlock uploadProgressBlock;
 @property (nonatomic, copy) AFURLSessionTaskProgressBlock downloadProgressBlock;
@@ -213,7 +217,7 @@ - (void)URLSession:(__unused NSURLSession *)session
         self.mutableData = nil;
     }
 
-#if AF_CAN_USE_AT_AVAILABLE
+#if AF_CAN_USE_AT_AVAILABLE && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
     if (@available(iOS 10, macOS 10.12, watchOS 3, tvOS 10, *)) {
         if (self.sessionTaskMetrics) {
             userInfo[AFNetworkingTaskDidCompleteSessionTaskMetrics] = self.sessionTaskMetrics;
@@ -269,11 +273,13 @@ - (void)URLSession:(__unused NSURLSession *)session
     }
 }
 
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
 - (void)URLSession:(NSURLSession *)session
               task:(NSURLSessionTask *)task
 didFinishCollectingMetrics:(NSURLSessionTaskMetrics *)metrics {
     self.sessionTaskMetrics = metrics;
 }
+#endif
 
 #pragma mark - NSURLSessionDataDelegate
 
@@ -889,9 +895,11 @@ - (void)setTaskDidCompleteBlock:(void (^)(NSURLSession *session, NSURLSessionTas
     self.taskDidComplete = block;
 }
 
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
 - (void)setTaskDidFinishCollectingMetricsBlock:(void (^)(NSURLSession * _Nonnull, NSURLSessionTask * _Nonnull, NSURLSessionTaskMetrics * _Nullable))block {
     self.taskDidFinishCollectingMetrics = block;
 }
+#endif
 
 #pragma mark -
 
@@ -1099,6 +1107,7 @@ - (void)URLSession:(NSURLSession *)session
     }
 }
 
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
 - (void)URLSession:(NSURLSession *)session
               task:(NSURLSessionTask *)task
 didFinishCollectingMetrics:(NSURLSessionTaskMetrics *)metrics
@@ -1113,6 +1122,7 @@ - (void)URLSession:(NSURLSession *)session
         self.taskDidFinishCollectingMetrics(session, task, metrics);
     }
 }
+#endif
 
 #pragma mark - NSURLSessionDataDelegate
 
diff --git a/Tests/Tests/AFURLSessionManagerTests.m b/Tests/Tests/AFURLSessionManagerTests.m
index deb067dfe2..b34e5c0745 100644
--- a/Tests/Tests/AFURLSessionManagerTests.m
+++ b/Tests/Tests/AFURLSessionManagerTests.m
@@ -143,10 +143,12 @@ - (void)testSessionTaskDoesReportMetrics {
         return YES;
     }];
 
+#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
     __weak XCTestExpectation *metricsBlock = [self expectationWithDescription:@"Metrics completion block is called"];
     [self.localManager setTaskDidFinishCollectingMetricsBlock:^(NSURLSession * _Nonnull session, NSURLSessionTask * _Nonnull task, NSURLSessionTaskMetrics * _Nullable metrics) {
         [metricsBlock fulfill];
     }];
+#endif
 
     NSURLSessionTask *task = [self.localManager downloadTaskWithRequest:[self bigImageURLRequest]
                                                                progress:nil