diff --git GitUp/Application/AppDelegate.m GitUp/Application/AppDelegate.m
index 1042982..a07370e 100644
--- GitUp/Application/AppDelegate.m
+++ GitUp/Application/AppDelegate.m
@@ -41,7 +41,7 @@
 #define kToolName @"gitup"
 #define kToolInstallPath @"/usr/local/bin/" kToolName

-@interface AppDelegate () <NSUserNotificationCenterDelegate, SUUpdaterDelegate>
+@interface AppDelegate () <NSUserNotificationCenterDelegate>
 @property(nonatomic, strong) AboutWindowController* aboutWindowController;
 @property(nonatomic, strong) CloneWindowController* cloneWindowController;
 @property(nonatomic, strong) PreferencesWindowController* preferencesWindowController;
@@ -49,7 +49,6 @@ @interface AppDelegate () <NSUserNotificationCenterDelegate, SUUpdaterDelegate>
 @end

 @implementation AppDelegate {
-  SUUpdater* _updater;
   BOOL _manualCheck;

   CFMessagePortRef _messagePort;
@@ -71,20 +70,9 @@ - (CloneWindowController*)cloneWindowController {
   return _cloneWindowController;
 }

-- (void)didChangeReleaseChannel:(BOOL)didChange {
-  if (didChange) {
-    _manualCheck = NO;
-    [_updater checkForUpdatesInBackground];
-  }
-}
-
 - (PreferencesWindowController*)preferencesWindowController {
   if (!_preferencesWindowController) {
     _preferencesWindowController = [[PreferencesWindowController alloc] init];
-    __weak typeof(self) weakSelf = self;
-    _preferencesWindowController.didChangeReleaseChannel = ^(BOOL didChange) {
-      [weakSelf didChangeReleaseChannel:didChange];
-    };
   }
   return _preferencesWindowController;
 }
@@ -110,7 +98,6 @@ + (void)initialize {
     GICommitMessageViewUserDefaultKey_ShowMargins : @(YES),
     GICommitMessageViewUserDefaultKey_EnableSpellChecking : @(YES),
     GIUserDefaultKey_FontSize : @(GIDefaultFontSize),
-    kUserDefaultsKey_ReleaseChannel : PreferencesWindowController_ReleaseChannel_Stable,
     kUserDefaultsKey_CheckInterval : @(15 * 60),
     kUserDefaultsKey_FirstLaunch : @(YES),
     kUserDefaultsKey_DiffWhitespaceMode : @(kGCLiveRepositoryDiffWhitespaceMode_Normal),
@@ -196,18 +183,6 @@ - (void)applicationWillFinishLaunching:(NSNotification*)notification {
 }

 - (void)applicationDidFinishLaunching:(NSNotification*)notification {
-#if !DEBUG
-  // Initialize Sparkle and check for update immediately
-  if (![[NSUserDefaults standardUserDefaults] boolForKey:kUserDefaultsKey_DisableSparkle]) {
-    _updater = [SUUpdater sharedUpdater];
-    _updater.delegate = self;
-    _updater.automaticallyChecksForUpdates = YES;
-    _updater.sendsSystemProfile = NO;
-
-    _manualCheck = NO;
-    [_updater checkForUpdatesInBackground];
-  }
-#endif

   // Locate installed apps.
   [GILaunchServicesLocator setup];
@@ -354,9 +329,6 @@ - (NSDictionary*)_processToolCommand:(NSDictionary*)input {
 #pragma mark - Actions

 - (BOOL)validateMenuItem:(NSMenuItem*)menuItem {
-  if (menuItem.action == @selector(checkForUpdates:)) {
-    return [_updater validateMenuItem:menuItem];
-  }
   return YES;
 }

@@ -462,11 +434,6 @@ - (IBAction)dimissModal:(id)sender {
   [[(NSButton*)sender window] orderOut:nil];
 }

-- (IBAction)checkForUpdates:(id)sender {
-  _manualCheck = YES;
-  [_updater checkForUpdatesInBackground];
-}
-
 - (IBAction)installTool:(id)sender {
   AuthorizationRef authorization;
   OSStatus status = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagDefaults, &authorization);
@@ -526,46 +493,4 @@ - (void)userNotificationCenter:(NSUserNotificationCenter*)center didActivateNoti
   }
 }

-#pragma mark - SUUpdaterDelegate
-
-- (NSString*)feedURLStringForUpdater:(SUUpdater*)updater {
-  NSString* channel = [[NSUserDefaults standardUserDefaults] stringForKey:kUserDefaultsKey_ReleaseChannel];
-  return [NSString stringWithFormat:kURL_AppCast, channel];
-}
-
-- (void)updater:(SUUpdater*)updater didFindValidUpdate:(SUAppcastItem*)item {
-  NSString* channel = [[NSUserDefaults standardUserDefaults] stringForKey:kUserDefaultsKey_ReleaseChannel];
-  XLOG_INFO(@"Did find app update on channel '%@' for version %@", channel, item.versionString);
-}
-
-- (void)updaterDidNotFindUpdate:(SUUpdater*)updater {
-  NSString* channel = [[NSUserDefaults standardUserDefaults] stringForKey:kUserDefaultsKey_ReleaseChannel];
-  XLOG_VERBOSE(@"App is up-to-date at version %@ on channel '%@'", [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"], channel);
-  if (_manualCheck) {
-    NSAlert* alert = [[NSAlert alloc] init];
-    alert.messageText = NSLocalizedString(@"GitUp is already up-to-date!", nil);
-    [alert addButtonWithTitle:NSLocalizedString(@"OK", nil)];
-    alert.type = kGIAlertType_Note;
-    [alert runModal];
-  }
-}
-
-- (void)updater:(SUUpdater*)updater didAbortWithError:(NSError*)error {
-  NSString* channel = [[NSUserDefaults standardUserDefaults] stringForKey:kUserDefaultsKey_ReleaseChannel];
-  if (![error.domain isEqualToString:SUSparkleErrorDomain] || (error.code != SUNoUpdateError)) {
-    XLOG_ERROR(@"App update on channel '%@' aborted: %@", channel, error);
-  }
-}
-
-- (void)updater:(SUUpdater*)updater willInstallUpdate:(SUAppcastItem*)item {
-  XLOG_INFO(@"Installing app update for version %@", item.versionString);
-}
-
-- (void)updater:(SUUpdater*)updater willInstallUpdateOnQuit:(SUAppcastItem*)item immediateInstallationInvocation:(NSInvocation*)invocation {
-  XLOG_INFO(@"Will install app update for version %@ on quit", item.versionString);
-  [self _showNotificationWithTitle:NSLocalizedString(@"Update Available", nil)
-                            action:NULL
-                           message:NSLocalizedString(@"Relaunch GitUp to update to version %@ (%@).", nil), item.displayVersionString, item.versionString];
-}
-
 @end
diff --git GitUp/Application/Base.lproj/MainMenu.xib GitUp/Application/Base.lproj/MainMenu.xib
index 528efb4..711833c 100644
--- GitUp/Application/Base.lproj/MainMenu.xib
+++ GitUp/Application/Base.lproj/MainMenu.xib
@@ -25,12 +25,6 @@
                                     <action selector="showAboutPanel:" target="Voe-Tx-rLC" id="uMT-pN-nex"/>
                                 </connections>
                             </menuItem>
-                            <menuItem title="Check for Updates…" id="RvP-51-UEO">
-                                <modifierMask key="keyEquivalentModifierMask"/>
-                                <connections>
-                                    <action selector="checkForUpdates:" target="Voe-Tx-rLC" id="Bx2-39-dyN"/>
-                                </connections>
-                            </menuItem>
                             <menuItem isSeparatorItem="YES" id="gLG-bh-eJk"/>
                             <menuItem title="Install Command Line Tool…" id="f9m-On-7Ly">
                                 <modifierMask key="keyEquivalentModifierMask"/>