This Mac tip is provided by Mark Greentree and was originally posted on Mark’s blog – Everyday Mac Support. For more of Mark’s tips visit his site, follow him on Twitter, or browse his archive of posts here.
Have you ever wanted to open all folders at the same time to see the contents within? With one simple keystroke and mouse click you can do just that.
Please make sure your Finder window is in List view by pressing Command + 2 on your keyboard or proceeding to View > As List from the Menu Bar.
Your Finder window should now look like this:
In this example we will use the Library folder because I know it has many folders and files within that offer a good example of this tip.
All you need to do is hold down the Option key on your keyboard and left click once on your mouse whilst hovering over the little grey triangle next to the folder.
Once this keystroke and mouse click is completed your finder window will look like this:
As you would be able to see from the above image, each folder in the directory has been opened showing their complete contents.