What is your question about updating an apple mac?

You can check for updates with software update by going to the Apple logo in the top left corner of the screen, and then choosing Software Update.

Is this what you wanted to know?

closing process

When it's still updating u can press the app that's updating one time to pause it and press it again to start updating it again.

updating is gile gile taik punye

Yes. Updating iTunes is absolutely free. As a matter of fact, so is updating your iDevice software, and Safari!