gistfile1.mm

// Restart your Cocoa application using Sparkle
// Author: Marc Charbonneau
// Source: http://blog.mbcharbonneau.com/2010/06/03/restart-your-cocoa-application-using-sparkle/

NSString *launcherSource = [[NSBundle bundleForClass:[SUUpdater class]]  pathForResource:@"relaunch" ofType:@""];
NSString *launcherTarget = [NSTemporaryDirectory() stringByAppendingPathComponent:[launcherSource lastPathComponent]];
NSString *appPath = [[NSBundle mainBundle] bundlePath];
NSString *processID = [NSString stringWithFormat:@"%d", [[NSProcessInfo processInfo] processIdentifier]];

[[NSFileManager defaultManager] removeItemAtPath:launcherTarget error:NULL];
[[NSFileManager defaultManager] copyItemAtPath:launcherSource toPath:launcherTarget error:NULL];

[NSTask launchedTaskWithLaunchPath:launcherTarget arguments:[NSArray arrayWithObjects:appPath, processID, nil]];
[NSApp terminate:sender];