diff --git a/UMEKit.xcodeproj/project.pbxproj b/UMEKit.xcodeproj/project.pbxproj
index 8b94826..5a64fcb 100644
--- a/UMEKit.xcodeproj/project.pbxproj
+++ b/UMEKit.xcodeproj/project.pbxproj
@@ -775,7 +775,11 @@
 			isa = PBXProject;
 			buildConfigurationList = 1DEB91B108733DA50010E9CD /* Build configuration list for PBXProject "UMEKit" */;
 			compatibilityVersion = "Xcode 3.1";
+			developmentRegion = English;
 			hasScannedForEncodings = 1;
+			knownRegions = (
+				en,
+			);
 			mainGroup = 0867D691FE84028FC02AAC07 /* UMEKit */;
 			productRefGroup = 034768DFFF38A50411DB9C8B /* Products */;
 			projectDirPath = "";
@@ -1003,7 +1007,7 @@
 				INFOPLIST_FILE = Info.plist;
 				INSTALL_PATH = "$(HOME)/Library/Frameworks";
 				PRODUCT_NAME = UMEKit;
-				SDKROOT = macosx10.5;
+				SDKROOT = macosx;
 				WRAPPER_EXTENSION = framework;
 			};
 			name = Debug;
@@ -1026,7 +1030,7 @@
 				INFOPLIST_FILE = Info.plist;
 				INSTALL_PATH = build/Release;
 				PRODUCT_NAME = UMEKit;
-				SDKROOT = macosx10.5;
+				SDKROOT = macosx;
 				WRAPPER_EXTENSION = framework;
 			};
 			name = Release;
@@ -1041,7 +1045,7 @@
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				PREBINDING = NO;
-				SDKROOT = macosx10.6;
+				SDKROOT = macosx;
 			};
 			name = Debug;
 		};
@@ -1053,7 +1057,7 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				PREBINDING = NO;
-				SDKROOT = macosx10.6;
+				SDKROOT = macosx;
 			};
 			name = Release;
 		};
@@ -1080,7 +1084,7 @@
 				);
 				PREBINDING = NO;
 				PRODUCT_NAME = DemoApp;
-				SDKROOT = "";
+				SDKROOT = macosx;
 			};
 			name = Debug;
 		};
@@ -1106,7 +1110,7 @@
 				);
 				PREBINDING = NO;
 				PRODUCT_NAME = DemoApp;
-				SDKROOT = "";
+				SDKROOT = macosx;
 				ZERO_LINK = NO;
 			};
 			name = Release;
diff --git a/include/UMEKit/UMETabBarItem.h b/include/UMEKit/UMETabBarItem.h
index 1b40072..85728d3 100644
--- a/include/UMEKit/UMETabBarItem.h
+++ b/include/UMEKit/UMETabBarItem.h
@@ -37,6 +37,7 @@ typedef enum {
 - (id)initWithTabBarSystemItem:(UMETabBarSystemItem)systemItem tag:(NSInteger)tag;
 // designated initializer
 - (id)initWithTitle:(NSString *)title image:(NSImage *)image tag:(NSInteger)tag;
+- (void)setSelectedImage:(NSImage *)image;
 
 @property (nonatomic, copy) NSString *badgeValue;    // default is nil
 @end
diff --git a/src/UMETabBarItem.m b/src/UMETabBarItem.m
index d9f8013..ac16fc1 100644
--- a/src/UMETabBarItem.m
+++ b/src/UMETabBarItem.m
@@ -165,6 +165,12 @@ - (void)setImage:(NSImage *)img {
     [button setImage:img];
 }
 
+- (void)setSelectedImage:(NSImage *)image {
+    
+    [button setAlternateImage:image];
+    
+}
+
 
 - (void)setTag:(NSInteger)aTag {
     [super setTag:aTag];