Improve the looks a bit on Yosemite. The app must now be compiled with the 10.10 SDK.

Transmission.xcodeproj/project.pbxproj

@@ -3321,7 +3321,7 @@
 				LIBRARY_SEARCH_PATHS = "third-party/curl/lib";
 				MACOSX_DEPLOYMENT_TARGET = 10.6;
 				ONLY_ACTIVE_ARCH = YES;
-				SDKROOT = macosx10.8;
+				SDKROOT = macosx10.10;
 				STRIP_INSTALLED_PRODUCT = NO;
 			};
 			name = Debug;
@@ -3438,7 +3438,7 @@
 				LIBRARY_SEARCH_PATHS = "third-party/curl/lib";
 				MACOSX_DEPLOYMENT_TARGET = 10.6;
 				OTHER_CFLAGS = "-DNDEBUG";
-				SDKROOT = macosx10.8;
+				SDKROOT = macosx10.10;
 			};
 			name = Release;
 		};
@@ -3496,7 +3496,7 @@
 				INFOPLIST_PREPROCESS = YES;
 				LIBRARY_SEARCH_PATHS = "third-party/curl/lib";
 				MACOSX_DEPLOYMENT_TARGET = 10.6;
-				SDKROOT = macosx10.8;
+				SDKROOT = macosx10.10;
 				STRIP_INSTALLED_PRODUCT = NO;
 			};
 			name = "Release - Debug";
@@ -3595,9 +3595,7 @@
 		A2E384CF130DFB1D001F501B /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					POSIX,
-				);
+				GCC_PREPROCESSOR_DEFINITIONS = POSIX;
 				PRODUCT_NAME = utp;
 			};
 			name = Debug;
@@ -3605,9 +3603,7 @@
 		A2E384D0130DFB1D001F501B /* Release - Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					POSIX,
-				);
+				GCC_PREPROCESSOR_DEFINITIONS = POSIX;
 				PRODUCT_NAME = utp;
 			};
 			name = "Release - Debug";

macosx/FilterBarView.m

@@ -23,6 +23,7 @@
  *****************************************************************************/
 
 #import "FilterBarView.h"
+#import "NSApplicationAdditions.h"
 
 @implementation FilterBarView
 
@@ -30,10 +31,12 @@
 {
     if ((self = [super initWithFrame: rect]))
     {
+        if (![NSApp isOnYosemiteOrBetter]) {
             NSColor * lightColor = [NSColor colorWithCalibratedRed: 235.0/255.0 green: 235.0/255.0 blue: 235.0/255.0 alpha: 1.0];
             NSColor * darkColor = [NSColor colorWithCalibratedRed: 205.0/255.0 green: 205.0/255.0 blue: 205.0/255.0 alpha: 1.0];
             fGradient = [[NSGradient alloc] initWithStartingColor: lightColor endingColor: darkColor];
         }
+    }
     return self;
 }
 
@@ -55,6 +58,18 @@
 
 - (void) drawRect: (NSRect) rect
 {
+    if ([NSApp isOnYosemiteOrBetter]) {
+        [[NSColor windowBackgroundColor] setFill];
+        NSRectFill(rect);
+        
+        const NSRect lineBorderRect = NSMakeRect(NSMinX(rect), 0.0, NSWidth(rect), 1.0);
+        if (NSIntersectsRect(lineBorderRect, rect))
+        {
+            [[NSColor lightGrayColor] setFill];
+            NSRectFill(lineBorderRect);
+        }
+    }
+    else {
         NSInteger count = 0;
         NSRect gridRects[2];
         NSColor * colorRects[2];
@@ -87,6 +102,7 @@
         }
         
         NSRectFillListWithColors(gridRects, colorRects, count);
+    }
 }
 
 @end

macosx/NSApplicationAdditions.h

@@ -32,5 +32,6 @@
 
 - (BOOL) isOnLionOrBetter;
 - (BOOL) isOnMountainLionOrBetter;
+- (BOOL) isOnYosemiteOrBetter;
 
 @end

macosx/NSApplicationAdditions.m

@@ -36,4 +36,9 @@
     return floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_7;
 }
 
+- (BOOL) isOnYosemiteOrBetter
+{
+    return floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_9;
+}
+
 @end

macosx/StatusBarView.m

@@ -42,7 +42,7 @@
         NSColor * darkColor = [NSColor colorWithCalibratedRed: 155.0/255.0 green: 155.0/255.0 blue: 155.0/255.0 alpha: 1.0];
         fGradient = [[NSGradient alloc] initWithStartingColor: lightColor endingColor: darkColor];
         
-        if([NSApp isOnLionOrBetter])
+        if([NSApp isOnLionOrBetter] && ![NSApp isOnYosemiteOrBetter])
         {
             CIFilter * randomFilter = [CIFilter filterWithName: @"CIRandomGenerator"];
             [randomFilter setDefaults];
@@ -85,6 +85,18 @@
 
 - (void) drawRect: (NSRect) rect
 {
+    if ([NSApp isOnYosemiteOrBetter]) {
+        [[NSColor windowBackgroundColor] setFill];
+        NSRectFill(rect);
+        
+        const NSRect lineBorderRect = NSMakeRect(NSMinX(rect), 0.0, NSWidth(rect), 1.0);
+        if (NSIntersectsRect(lineBorderRect, rect))
+        {
+            [[NSColor lightGrayColor] setFill];
+            NSRectFill(lineBorderRect);
+        }
+    }
+    else {
         const BOOL active = [[self window] isMainWindow];
         
         NSInteger count = 0;
@@ -145,6 +157,7 @@
                           operation: NSCompositeSourceOver
                            fraction: 0.12];
         }
+    }
 }
 
 @end