diff --git a/BeaconOSX.xcodeproj/project.pbxproj b/BeaconOSX.xcodeproj/project.pbxproj
index a9718cd..939fa75 100644
--- a/BeaconOSX.xcodeproj/project.pbxproj
+++ b/BeaconOSX.xcodeproj/project.pbxproj
@@ -404,8 +404,9 @@
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "BeaconOSX/BeaconOSX-Prefix.pch";
 				INFOPLIST_FILE = "BeaconOSX/BeaconOSX-Info.plist";
+				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SDKROOT = macosx10.9;
+				SDKROOT = macosx10.11;
 				WRAPPER_EXTENSION = app;
 			};
 			name = Debug;
@@ -418,8 +419,9 @@
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "BeaconOSX/BeaconOSX-Prefix.pch";
 				INFOPLIST_FILE = "BeaconOSX/BeaconOSX-Info.plist";
+				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SDKROOT = macosx10.9;
+				SDKROOT = macosx10.11;
 				WRAPPER_EXTENSION = app;
 			};
 			name = Release;
diff --git a/BeaconOSX/BLCAppDelegate.m b/BeaconOSX/BLCAppDelegate.m
index 4fa0d78..94dcb89 100644
--- a/BeaconOSX/BLCAppDelegate.m
+++ b/BeaconOSX/BLCAppDelegate.m
@@ -71,12 +71,12 @@ - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
     NSInteger major = [[version objectAtIndex:0] integerValue];
     NSInteger minor = [[version objectAtIndex:1] integerValue];
         
-    if (major == 10 && minor != 9) {
+    if (major == 10 && minor < 9) {
         NSAlert* alert = [NSAlert alertWithMessageText:@"Unsupported OS"
                                          defaultButton:@"OK"
                                        alternateButton:nil
                                            otherButton:nil
-                             informativeTextWithFormat:@"BeaconOSX requires OS X Mavericks!!!\n\nBeaconOSX does NOT work with versions of OS X before or after Mavericks, e.g. Yosemite"];
+                             informativeTextWithFormat:@"BeaconOSX requires OS X Mavericks!!!\n\nBeaconOSX does NOT work with versions of OS X before Mavericks"];
         
         [alert beginSheetModalForWindow:self.window completionHandler:^(NSModalResponse returnCode) {
             exit(-1);