I was also facing same kind of problem on my Macbook Pro. I took these very simple steps and freshly installed Android Studio.
** Link Contains Images, look if facing any problem.
These Very Simple Steps Can Solve Your Problem.
- Type "Command+option+Space Bar"
- Type "Android Studio"
- Click '+' button just below search box.
- A new bar will come up "Kind" is "any" click on "kind" --> Others --> search for "system file" and select that by putting a tick mark.! And click on Ok.
- Then select "are included" from the drop down menu !
- Then you get a lot of system file that need to be deleted to complete the fully un-installation of any app.
- Click "command+A" to select all files and take a look on the file remove is some video files are also included. And click "command + Delete"
- Empty your trash. Done