open url with non-default application

gistfile1.m

NSURL *url = [NSURL URLWithString:@"http://www.example.com/"];
[[NSWorkspace sharedWorkspace] openURLs:[NSArray arrayWithObject:url]
                withAppBundleIdentifier:@"com.apple.Safari" //取得したidentifierを渡してやる
                                options:NSWorkspaceLaunchDefault
         additionalEventParamDescriptor:nil
                      launchIdentifiers:nil];