I have a folder that starts with a dot
. but unable to display them in Finder.
How can I say that for folder X Finder should also display hidden files/folders?
I don't think you can set this for individual folders. To set it globally, so that Finder always shows hidden files, run Terminal and enter the following two commands:
To switch back, do the same but substitute FALSE for TRUE.
I myself use hiddenfiles widget. it's so easy to use.