diff --git a/device/bluetooth/bluetooth_discovery_manager_mac.mm b/device/bluetooth/bluetooth_discovery_manager_mac.mm
index bccb75c98b137e..7a8dc3e4777938 100644
--- a/device/bluetooth/bluetooth_discovery_manager_mac.mm
+++ b/device/bluetooth/bluetooth_discovery_manager_mac.mm
@@ -25,6 +25,7 @@ class BluetoothDiscoveryManagerMacClassic;
 
 - (instancetype)initWithManager:
     (device::BluetoothDiscoveryManagerMacClassic*)manager;
+- (void)resetManager;
 
 @end
 
@@ -48,10 +49,21 @@ class BluetoothDiscoveryManagerMacClassic
       const BluetoothDiscoveryManagerMacClassic&) = delete;
 
   ~BluetoothDiscoveryManagerMacClassic() override {
+    [inquiry_ stop];
     // IOBluetoothDeviceInquiry's delegate property is configured as "assign"
     // rather than "weak". If it is not manually reset then our delegate could be
     // accessed after we drop our strong reference and the object is freed.
     inquiry_.delegate = nil;
+    // Clear the back-pointer so any kept-alive callback becomes a no-op
+    // instead of dereferencing this freed C++ object.
+    [inquiry_delegate_ resetManager];
+    // Keep `inquiry_delegate_` alive across one main-run-loop turn so any
+    // already-enqueued IOBluetooth callbacks (which captured the assign-held
+    // delegate id at enqueue time) hit a live receiver. See FB13705522.
+    BluetoothDeviceInquiryDelegate* __strong delegate = inquiry_delegate_;
+    dispatch_async(dispatch_get_main_queue(), ^{
+      (void)delegate;
+    });
   }
 
   // BluetoothDiscoveryManagerMac override.
@@ -213,19 +225,29 @@ BluetoothDiscoveryManagerMac* BluetoothDiscoveryManagerMac::CreateClassic(
   return self;
 }
 
+- (void)resetManager {
+  _manager = nullptr;
+}
+
 - (void)deviceInquiryStarted:(IOBluetoothDeviceInquiry*)sender {
-  _manager->DeviceInquiryStarted(sender);
+  if (_manager) {
+    _manager->DeviceInquiryStarted(sender);
+  }
 }
 
 - (void)deviceInquiryDeviceFound:(IOBluetoothDeviceInquiry*)sender
                           device:(IOBluetoothDevice*)device {
-  _manager->DeviceFound(sender, device);
+  if (_manager) {
+    _manager->DeviceFound(sender, device);
+  }
 }
 
 - (void)deviceInquiryComplete:(IOBluetoothDeviceInquiry*)sender
                         error:(IOReturn)error
                       aborted:(BOOL)aborted {
-  _manager->DeviceInquiryComplete(sender, error, aborted);
+  if (_manager) {
+    _manager->DeviceInquiryComplete(sender, error, aborted);
+  }
 }
 
 @end