Convert to ARC.

src/macos/AboutBox.m

@@ -38,10 +38,7 @@ static AboutBox *sharedInstance = nil;
 
 - (id)init
 {
-  if (sharedInstance)
-    [self release];
-  else
-    sharedInstance = [super init];
+  if (!sharedInstance) sharedInstance = [super init];
 
   return sharedInstance;
 }

src/macos/Preferences.m

@@ -49,7 +49,7 @@ static Preferences *sharedInstance = nil;
 - (id)init
 {
   if (self = [super init]) {
-    defaults = [[NSUserDefaults standardUserDefaults] retain];
+    defaults = [NSUserDefaults standardUserDefaults];
     sharedInstance = self;
   }
   return(self);
@@ -57,42 +57,39 @@ static Preferences *sharedInstance = nil;
 
 - (void)dealloc
 {
-  [defaults release];
   if (self == sharedInstance) {
     sharedInstance = nil;
   }
   
-  [super dealloc];
 }
 
 - (void)setString:(const char *)key : (const char *)value
 {
-  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  @autoreleasepool {
     NSString* theKey   = [NSString stringWithCString:key encoding:NSUTF8StringEncoding];
     NSString* theValue = [NSString stringWithCString:value encoding:NSUTF8StringEncoding];
 
     [defaults setObject:theValue forKey:theKey];
-  [pool release];
+  }
 }
 
 - (void)getString:(const char *)key : (char *)value : (int)size
 {
-  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  @autoreleasepool {
     NSString* theKey   = [NSString stringWithCString:key encoding:NSUTF8StringEncoding];
     NSString* theValue = [defaults objectForKey:theKey];
     if (theValue != nil)
       strncpy(value, [theValue cStringUsingEncoding: NSUTF8StringEncoding], size);
     else
       value[0] = 0;
-
-  [pool release];
+  }
 }
 
 - (void)save
 {
-  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  @autoreleasepool {
     [defaults synchronize];
-  [pool release];
+  }
 }
 
 @end

src/macos/stella.xcodeproj/project.pbxproj

@@ -3014,6 +3014,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_ENABLE_OBJC_WEAK = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -3067,6 +3068,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_ENABLE_OBJC_WEAK = YES;
 				COMBINE_HIDPI_IMAGES = YES;
 				FRAMEWORK_SEARCH_PATHS = (