Intellij IDEA doesn’t show hidden files in the file chooser dialog on Mac OS/X. This can be frustrating when you are trying to find files that are always in a hidden directory, such as Maven files. There are two ways around this.
This will enable it for the current window
ctrl + shift + .
There is another solution, but it involves editing the registry. Hit the following keys to access the Find Action menu.
cmd + shift + a
Once there, scroll down to ide.mac.file.chooser.show.hidden.files. Check the checkbox and select Close and away you go.
sheltonn July 28th, 2015