From 2393d64a5ad7151cced97dd531af5ceb24f4399e Mon Sep 17 00:00:00 2001
From: Vojtech Bubnik <bubnikv@gmail.com>
Date: Tue, 9 Feb 2021 19:51:56 +0100
Subject: [PATCH] Fixed some OSX Objective C warnings.

---
 src/slic3r/GUI/InstanceCheckMac.mm        |  6 +++---
 src/slic3r/GUI/RemovableDriveManagerMM.mm | 10 +++++-----
 src/slic3r/Utils/RetinaHelperImpl.mm      |  2 +-
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/slic3r/GUI/InstanceCheckMac.mm b/src/slic3r/GUI/InstanceCheckMac.mm
index 9969b1a7b2..1d6f244e85 100644
--- a/src/slic3r/GUI/InstanceCheckMac.mm
+++ b/src/slic3r/GUI/InstanceCheckMac.mm
@@ -57,7 +57,7 @@ void OtherInstanceMessageHandler::register_for_messages(const std::string &versi
 	m_impl_osx = [[OtherInstanceMessageHandlerMac alloc] init];
 	if(m_impl_osx) {
 		NSString *nsver = [NSString stringWithCString:version_hash.c_str() encoding:[NSString defaultCStringEncoding]];
-		[m_impl_osx add_observer:nsver];
+		[(id)m_impl_osx add_observer:nsver];
 	}
 }
 
@@ -65,7 +65,7 @@ void OtherInstanceMessageHandler::unregister_for_messages()
 {
 	//NSLog(@"unreegistering other instance messages");
 	if (m_impl_osx) {
-        [m_impl_osx release];
+        [(id)m_impl_osx release];
         m_impl_osx = nullptr;
     } else {
 		NSLog(@"warning: unregister instance InstanceCheck notifications not required");
@@ -75,7 +75,7 @@ void OtherInstanceMessageHandler::unregister_for_messages()
 void OtherInstanceMessageHandler::bring_instance_forward()
 {
 	if (m_impl_osx) {
-		[m_impl_osx bring_forward];
+		[(id)m_impl_osx bring_forward];
 	}
 }
 }//namespace GUI
diff --git a/src/slic3r/GUI/RemovableDriveManagerMM.mm b/src/slic3r/GUI/RemovableDriveManagerMM.mm
index 0b8646af17..0dbe38909c 100644
--- a/src/slic3r/GUI/RemovableDriveManagerMM.mm
+++ b/src/slic3r/GUI/RemovableDriveManagerMM.mm
@@ -69,7 +69,7 @@ static void unmount_callback(DADiskRef disk, DADissenterRef dissenter, void *con
         }
         if (err == 0) {
             CFTypeRef mediaEjectableKey = CFDictionaryGetValue(descDict,kDADiskDescriptionMediaEjectableKey);
-            BOOL ejectable = [mediaEjectableKey boolValue];
+            BOOL ejectable = [(id)mediaEjectableKey boolValue];
             CFTypeRef deviceProtocolName = CFDictionaryGetValue(descDict,kDADiskDescriptionDeviceProtocolKey);
             
             CFTypeRef deviceModelKey = CFDictionaryGetValue(descDict, kDADiskDescriptionDeviceModelKey);
@@ -124,13 +124,13 @@ void RemovableDriveManager::register_window_osx()
     assert(m_impl_osx == nullptr);
     m_impl_osx = [[RemovableDriveManagerMM alloc] init];
 	if (m_impl_osx)
-		[m_impl_osx add_unmount_observer];
+		[(id)m_impl_osx add_unmount_observer];
 }
 
 void RemovableDriveManager::unregister_window_osx()
 {
     if (m_impl_osx) {
-        [m_impl_osx release];
+        [(id)m_impl_osx release];
         m_impl_osx = nullptr;
     }
 }
@@ -144,7 +144,7 @@ void RemovableDriveManager::list_devices(std::vector<DriveData> &out) const
 {
     assert(m_impl_osx != nullptr);
     if (m_impl_osx) {
-    	NSArray* devices = [m_impl_osx list_dev];
+    	NSArray* devices = [(id)m_impl_osx list_dev];
     	for (NSString* volumePath in devices)
         	search_for_drives_internal::inspect_file(std::string([volumePath UTF8String]), "/Volumes", out);
     }
@@ -156,7 +156,7 @@ void RemovableDriveManager::eject_device(const std::string &path)
     assert(m_impl_osx != nullptr);
     if (m_impl_osx) {
         NSString * pth = [NSString stringWithCString:path.c_str() encoding:[NSString defaultCStringEncoding]];
-        [m_impl_osx eject_drive:pth];
+        [(id)m_impl_osx eject_drive:pth];
     }
 }
 
diff --git a/src/slic3r/Utils/RetinaHelperImpl.mm b/src/slic3r/Utils/RetinaHelperImpl.mm
index e33124f962..509029a10e 100644
--- a/src/slic3r/Utils/RetinaHelperImpl.mm
+++ b/src/slic3r/Utils/RetinaHelperImpl.mm
@@ -19,7 +19,7 @@ RetinaHelper::RetinaHelper(wxWindow *window)
 
 RetinaHelper::~RetinaHelper()
 {
-    [m_self release];
+    [(id)m_self release];
 }
 
 void RetinaHelper::set_use_retina(bool aValue)