2.) To unlock an application, you can do it by selecting Apple> “Force Quit” in the menu bar. The dialog box “Force the output from applications” with the selected application.

3.) You can also restart the Finder from this same dialog box in this case the application is blocked. After that, restart your computer to make sure that the problem is completely solved.

4.) If the problem of blocking programs happen frequently, choose Help> “Help Center” in the menu bar of the upper part of the screen. To get information on what to do when the system crashes or does not respond, look for the word “freeze” in the spotlight of your Macbook.

5.) To obtain technical support and contact information about the software whichis installed on your MacBook , visit the site of Apple .