Q:

Cannot resolve symbol "actionBarActivity" - Android

A few days ago I updated my android studio and gradle to 4.4.1.  When I tried to create a class main activity which extends actionbaractivity like this
    public class MainActivity extends ActionBarActivity {

I am getting an error "cannot resolve action bar activity".  I am also getting the error in similar code such as imports and usage of the action bar activity such as  
      import android.support.v7.app. ActionBarActivity;

and 
    super.onCreate(savedInstanceState);

as well as uses of    findViewById.  
Here is a screen shot for further info, I am using mac os (Sierra) and running the newest version of android studio and jdk. 
Here is the error screen/panel:
https://imgur.com/a/SApx4
and here is the code screen/panel
https://imgur.com/a/45WIi
Any help would be greatly appreciated. 

A:

Extend AppCompatActivity instead. 
(EDIT: I saw you made a comment about HAX, that's emulator specific.  To test your emulator, you would open another AS project and see if it will open in the emulator.  It may be possible that HAX isn't supported on your computer.)