I have not been using Unity for a while. I tried to open a project which I developed under Version 5.3. When I opened it, Unity told me that I may have to reimport assets. I pressed continue, and then on Assets folder in project window, I chose reimport all, however nothing showed up. When I tried to view my assets by “Reveal in Finder”, I could see all my asset files.
See my first screen which shows the assets folder is empty:
See the second screen which I revealed assets in finder:
Please help to solve this problem. I double checked and know for sure that I am opening the correct project folder.