Watch this video for a helpful tip on how to use secret folder application and protect folders in your MAC PC by hiding it. you could download secret folder application from version tracker.com for free go to the Website and click download button to download the application on your Mac PC open the secret folder application. click on the required password button, put your desired password and re enter to confirm. to access your file, click the plus button at the lower left. choose the desired folder to be protected. now you can make the folder visible or invisible by clicking the box to the left or to the right. simply access the application anytime if you want to hide or unhide file folders.