diff --git a/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj b/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
index 443cd4882..3e65642b2 100644
--- a/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj	
+++ b/OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj	
@@ -1434,7 +1434,6 @@
 		4BBB70A3202011C2002FE009 /* MultiMediaTarget.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MultiMediaTarget.cpp; sourceTree = "<group>"; };
 		4BBB70A6202014E2002FE009 /* MultiCRTMachine.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = MultiCRTMachine.cpp; sourceTree = "<group>"; };
 		4BBB70A7202014E2002FE009 /* MultiCRTMachine.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = MultiCRTMachine.hpp; sourceTree = "<group>"; };
-		4BBC34241D2208B100FFC9DF /* CSFastLoading.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSFastLoading.h; sourceTree = "<group>"; };
 		4BBC951C1F368D83008F4C34 /* i8272.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = i8272.cpp; path = 8272/i8272.cpp; sourceTree = "<group>"; };
 		4BBC951D1F368D83008F4C34 /* i8272.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; name = i8272.hpp; path = 8272/i8272.hpp; sourceTree = "<group>"; };
 		4BBF49AE1ED2880200AB3669 /* FUSETests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = FUSETests.swift; sourceTree = "<group>"; };
@@ -1774,7 +1773,6 @@
 		4B2A53921D117D36003C6002 /* Machine */ = {
 			isa = PBXGroup;
 			children = (
-				4BBC34241D2208B100FFC9DF /* CSFastLoading.h */,
 				4B2A53951D117D36003C6002 /* CSMachine.h */,
 				4B643F3C1D77AE5C00D431D6 /* CSMachine+Target.h */,
 				4B2A53971D117D36003C6002 /* KeyCodes.h */,
diff --git a/OSBindings/Mac/Clock Signal/ClockSignal-Bridging-Header.h b/OSBindings/Mac/Clock Signal/ClockSignal-Bridging-Header.h
index 5b21dd3fc..c39778ffd 100644
--- a/OSBindings/Mac/Clock Signal/ClockSignal-Bridging-Header.h	
+++ b/OSBindings/Mac/Clock Signal/ClockSignal-Bridging-Header.h	
@@ -3,7 +3,6 @@
 //
 
 #import "CSMachine.h"
-#import "CSFastLoading.h"
 
 #import "CSAtari2600.h"
 #import "CSZX8081.h"
diff --git a/OSBindings/Mac/Clock Signal/Documents/MachinePanel.swift b/OSBindings/Mac/Clock Signal/Documents/MachinePanel.swift
index 00cee7a17..c75998e14 100644
--- a/OSBindings/Mac/Clock Signal/Documents/MachinePanel.swift	
+++ b/OSBindings/Mac/Clock Signal/Documents/MachinePanel.swift	
@@ -22,11 +22,9 @@ class MachinePanel: NSPanel {
 	}
 	@IBOutlet var fastLoadingButton: NSButton?
 	@IBAction func setFastLoading(_ sender: NSButton!) {
-		if let fastLoadingMachine = machine as? CSFastLoading {
-			let useFastLoadingHack = sender.state == .on
-			fastLoadingMachine.useFastLoadingHack = useFastLoadingHack
-			UserDefaults.standard.set(useFastLoadingHack, forKey: fastLoadingUserDefaultsKey)
-		}
+		let useFastLoadingHack = sender.state == .on
+		machine.useFastLoadingHack = useFastLoadingHack
+		UserDefaults.standard.set(useFastLoadingHack, forKey: fastLoadingUserDefaultsKey)
 	}
 
 	// MARK: Quick Boot
@@ -71,10 +69,10 @@ class MachinePanel: NSPanel {
 			displayTypeUserDefaultsKey: 0
 		])
 
-		if let fastLoadingMachine = machine as? CSFastLoading {
+		if let fastLoadingButton = self.fastLoadingButton {
 			let useFastLoadingHack = standardUserDefaults.bool(forKey: self.fastLoadingUserDefaultsKey)
-			fastLoadingMachine.useFastLoadingHack = useFastLoadingHack
-			self.fastLoadingButton?.state = useFastLoadingHack ? .on : .off
+			machine.useFastLoadingHack = useFastLoadingHack
+			fastLoadingButton.state = useFastLoadingHack ? .on : .off
 		}
 
 		if let fastBootingButton = self.fastBootingButton {
diff --git a/OSBindings/Mac/Clock Signal/Machine/CSFastLoading.h b/OSBindings/Mac/Clock Signal/Machine/CSFastLoading.h
deleted file mode 100644
index 896f2d2dd..000000000
--- a/OSBindings/Mac/Clock Signal/Machine/CSFastLoading.h	
+++ /dev/null
@@ -1,11 +0,0 @@
-//
-//  CSFastLoading.h
-//  Clock Signal
-//
-//  Created by Thomas Harte on 05/06/2016.
-//  Copyright 2016 Thomas Harte. All rights reserved.
-//
-
-@protocol CSFastLoading <NSObject>
-@property (nonatomic, assign) BOOL useFastLoadingHack;
-@end
diff --git a/OSBindings/Mac/Clock Signal/Machine/CSMachine.h b/OSBindings/Mac/Clock Signal/Machine/CSMachine.h
index ddde679f3..660bd3bf8 100644
--- a/OSBindings/Mac/Clock Signal/Machine/CSMachine.h	
+++ b/OSBindings/Mac/Clock Signal/Machine/CSMachine.h	
@@ -9,7 +9,6 @@
 #import <Foundation/Foundation.h>
 
 #import "CSAudioQueue.h"
-#import "CSFastLoading.h"
 #import "CSOpenGLView.h"
 #import "CSStaticAnalyser.h"
 #import "CSJoystickManager.h"
diff --git a/OSBindings/Mac/Clock Signal/Machine/CSMachine.mm b/OSBindings/Mac/Clock Signal/Machine/CSMachine.mm
index 66492fc07..af942fb81 100644
--- a/OSBindings/Mac/Clock Signal/Machine/CSMachine.mm	
+++ b/OSBindings/Mac/Clock Signal/Machine/CSMachine.mm	
@@ -32,7 +32,7 @@
 #include "../../../../Outputs/OpenGL/ScanTarget.hpp"
 #include "../../../../Outputs/OpenGL/Screenshot.hpp"
 
-@interface CSMachine() <CSFastLoading>
+@interface CSMachine()
 - (void)speaker:(Outputs::Speaker::Speaker *)speaker didCompleteSamples:(const int16_t *)samples length:(int)length;
 - (void)speakerDidChangeInputClock:(Outputs::Speaker::Speaker *)speaker;
 - (void)addLED:(NSString *)led;