The built-in way
Turn on Stacks
- Click the Desktop, then choose View › Use Stacks (or Control-click the Desktop and choose Use Stacks).
- Files gather into piles by kind. Choose View › Group Stacks By to group by date or tag instead.
- Click a stack to open it and file what is inside.
Stacks only change how the Desktop looks. The files are all still in the Desktop folder.