diff --git a/Classes/FanControl.m b/Classes/FanControl.m
index 9a0b9c2..9ea3b5d 100644
--- a/Classes/FanControl.m
+++ b/Classes/FanControl.m
@@ -29,6 +29,12 @@
 #import <Sparkle/SUUpdater.h>
 #import "SystemVersion.h"
 
+@interface FanControl ()
++(void)copyMachinesIfNecessary;
+- (BOOL)isInAutoStart;
+- (void) setStartAtLogin:(BOOL)enabled;
+@end
+
 @implementation FanControl
 
 io_connect_t conn;
diff --git a/Classes/smcWrapper.m b/Classes/smcWrapper.m
index 8442e50..ea1d758 100644
--- a/Classes/smcWrapper.m
+++ b/Classes/smcWrapper.m
@@ -23,7 +23,7 @@
 #import "smcWrapper.h"
 #import <CommonCrypto/CommonDigest.h>
 
-NSString * const smc_checksum=@"0becdb25cdf64eb74b001c8a77c5e6b7";
+NSString * const smc_checksum=@"2ea544babe8a58dccc1364c920d473c8";
 static NSDictionary *tsensors = nil;
 
 @implementation smcWrapper
@@ -160,7 +160,8 @@ static NSDictionary *tsensors = nil;
     unsigned char result[CC_MD5_DIGEST_LENGTH];
     CC_MD5((void *)[d bytes], [d length], result);
     NSMutableString *ret = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH*2];
-    for(int i = 0; i<CC_MD5_DIGEST_LENGTH; i++) {
+    int i;
+    for(i = 0; i<CC_MD5_DIGEST_LENGTH; i++) {
         [ret appendFormat:@"%02x",result[i]];
     }
     return ret;
diff --git a/smcFanControl.xcodeproj/project.pbxproj b/smcFanControl.xcodeproj/project.pbxproj
index 093735a..31febc8 100644
--- a/smcFanControl.xcodeproj/project.pbxproj
+++ b/smcFanControl.xcodeproj/project.pbxproj
@@ -438,7 +438,7 @@
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_PREPROCESSOR_DEFINITIONS = CMD_TOOL;
 				GCC_SYMBOLS_PRIVATE_EXTERN = NO;
-				GCC_VERSION = "";
+				GCC_VERSION = com.apple.compilers.llvmgcc42;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_TYPECHECK_CALLS_TO_PRINTF = NO;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
@@ -463,7 +463,7 @@
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_ENABLE_OBJC_EXCEPTIONS = YES;
 				GCC_PREPROCESSOR_DEFINITIONS = CMD_TOOL;
-				GCC_VERSION = "";
+				GCC_VERSION = com.apple.compilers.llvmgcc42;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_TYPECHECK_CALLS_TO_PRINTF = NO;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
@@ -489,7 +489,7 @@
 				GCC_MODEL_PPC64 = NO;
 				GCC_MODEL_TUNING = "";
 				GCC_OPTIMIZATION_LEVEL = 0;
-				GCC_VERSION = "";
+				GCC_VERSION = com.apple.compilers.llvmgcc42;
 				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				GCC_WARN_TYPECHECK_CALLS_TO_PRINTF = NO;
 				INFOPLIST_FILE = Info.plist;
@@ -522,7 +522,7 @@
 				FRAMEWORK_SEARCH_PATHS_QUOTED_2 = "\"$(SRCROOT)\"";
 				GCC_GENERATE_DEBUGGING_SYMBOLS = NO;
 				GCC_MODEL_TUNING = "";
-				GCC_VERSION = "";
+				GCC_VERSION = com.apple.compilers.llvmgcc42;
 				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				GCC_WARN_TYPECHECK_CALLS_TO_PRINTF = NO;
 				INFOPLIST_FILE = Info.plist;
@@ -545,7 +545,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
-				GCC_VERSION = "";
+				GCC_VERSION = com.apple.compilers.llvmgcc42;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				MACOSX_DEPLOYMENT_TARGET = 10.5;
@@ -561,7 +561,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
-				GCC_VERSION = "";
+				GCC_VERSION = com.apple.compilers.llvmgcc42;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				MACOSX_DEPLOYMENT_TARGET = 10.5;
diff --git a/smcFanControl.xcodeproj/project.xcworkspace/xcuserdata/hendrikh.xcuserdatad/UserInterfaceState.xcuserstate b/smcFanControl.xcodeproj/project.xcworkspace/xcuserdata/hendrikh.xcuserdatad/UserInterfaceState.xcuserstate
index 157656a..1177061 100644
Binary files a/smcFanControl.xcodeproj/project.xcworkspace/xcuserdata/hendrikh.xcuserdatad/UserInterfaceState.xcuserstate and b/smcFanControl.xcodeproj/project.xcworkspace/xcuserdata/hendrikh.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/smcFanControl.xcodeproj/xcuserdata/hendrikh.xcuserdatad/xcschemes/smcFanControl.xcscheme b/smcFanControl.xcodeproj/xcuserdata/hendrikh.xcuserdatad/xcschemes/smcFanControl.xcscheme
index d8150df..f6b21a7 100644
--- a/smcFanControl.xcodeproj/xcuserdata/hendrikh.xcuserdatad/xcschemes/smcFanControl.xcscheme
+++ b/smcFanControl.xcodeproj/xcuserdata/hendrikh.xcuserdatad/xcschemes/smcFanControl.xcscheme
@@ -44,7 +44,7 @@
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Debug"
+      buildConfiguration = "Release"
       ignoresPersistentStateOnLaunch = "NO"
       debugDocumentVersioning = "YES"
       allowLocationSimulation = "YES">