I want to make my application as menu bar app and I made it already.
And also I want to track what application is running.

NSRunningApplication method returns all runnng applications.
But I want to detect the only application that is activated now. (with mouse click or command + tab...)
How can I find that?

I made code below :

```
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
     [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(performTimerBasedUpdate) userInfo:nil repeats:YES];
}

- (void)performTimerBasedUpdate {
     nowRunning = [NSRunningApplication currentApplication];
     nowRunningName = [nowRunning localizedName];
}

```

But, It returns the application name that I made (self).

* Answered

I finally find the answer : thank you i-blis.
I can get the activated application with filter.
I didn't know about isActive property!

```
runningApplications_ = [[NSWorkspace sharedWorkspace] runningApplications];
nowRunning = [[runningApplications_ filteredArrayUsingPredicate:isActive] objectAtIndex:0];
bundleIdentifier_ = [nowRunning bundleIdentifier];
localizedName = [nowRunning localizedName];

```