Hi shamakn,
Thanks for using Apple Support Communities. It sounds like you’re having trouble with an unresponsive app on your Mac. I’m happy to help. To start, I suggest making sure you’ve tried the steps here:
How to force an app to quit on your Mac - Apple Support
If that doesn’t help, I suggest restarting your Mac. You may have to force it to shut down if the app prevents it from doing so:
How to turn your Mac on or off - Apple Support
If the above doesn’t help, I suggest booting into safe mode:
Use safe mode to isolate issues with your Mac - Apple Support
Let me know if that helps.
Take care.