Finding specific things
The files are almost always still there. Three features hide them, and each looks like data loss.
View → Use Stacks groups everything by kind into piles. Files are not moved — they are collapsed. Turn it off with ⌃⌘0 or the View menu.
System Settings → Apple ID → iCloud → iCloud Drive → Options → Desktop & Documents Folders. When enabled, your Desktop moves into iCloud Drive. It still appears in Finder's sidebar, but the real path becomes:
~/Library/Mobile Documents/com~apple~CloudDocs/Desktop
If it was recently enabled and files have not finished downloading, the Desktop can look empty or partially populated. Turning the setting off later moves files into a local folder and is a common way people lose track of them.
Hides Desktop items while active by default. System Settings → Desktop & Dock → Stage Manager → Show Recent Apps / Desktop Items.
Finder → Settings → General controls whether hard disks, external disks and servers appear at all.
ls -la ~/Desktop
ls -la ~/Library/Mobile\ Documents/com~apple~CloudDocs/Desktop
One of those two has your files.
macOS creates a folder in your home directory — often called "Desktop (Archive)" or similar — containing what was in iCloud. Search for it:
find ~ -maxdepth 2 -iname "*Desktop*" -type d
Files move into iCloud Drive and may still be downloading. Check ~/Library/Mobile Documents/com~apple~CloudDocs/Desktop.
A view mode that groups Desktop files into piles by kind. Toggle with ⌃⌘0.
Everywhere keeps track of every file on your Mac — including the folders Spotlight hides and drives you have unplugged. Free for a day, then $19 once.
Download for Mac