If you got a new MacBook and the old one was using icloud to sync your folders, you can get an issue where it will not sync your icloud folders and files to your new Macbook.
Where is a fix for that
- Go to ~/Library/Application Support
- Move the folder CloudDocs to the trash.
- Kill the processes
birdusing Activity Monitor or Terminal.
Your iCloud Drive starts downloading your folders and files again.
If you have any issues don't hesitate to get in touch on Twitter