Mac: If you have a ton of Finder windows open, management becomes a chore. How-To Geek points out there's an option that will reorganise all those windows into one tabbed window for easier management.
From Finder, just click Window > Merge All Windows. This will bring in all your Finder windows together into one, even if they're on different Spaces. It's a simple, quick way to organise a messy desktop.
How to Merge Multiple Finder Windows on macOS [How-To Geek]