There are a couple of posts on this on forum (will try to find links). The following apple support article (link below) has a list of icould icons that are used for your mac to show when it is uploading / downloading files from your desktop and documents to your icloud account (the symbols are extracted below). these are similar to ilcoud music icons
If you want more info on icloud status turn on the "Show Status Bar" option in view menu of Finder - this will let you see all of the documents that are "Pending" (waiting) to upload. Another good option to view status of files is to select "Icloud Status" Column in finder, to select this go to view menu, select "Show View Options [command] J" then [TICK] "icloud status" AND "calculate all sizes"
icloud status icons / symbols: macOS Sierra: View file, folder, and disk information
- Show info below icons: Open a folder in the Finder, or click the desktop, choose View > Show View Options, then select “Show item info.”Item info can include file size, movie length, image dimensions, and more.
- View iCloud status: When iCloud Desktop and Documents is turned on, your folders and files may appear with one of the following status indicators in the iCloud Status column:Note: Even if the iCloud Status column is not in the Finder window, you can still see the status for most iCloud file transfers next to the folder or file name. The only icon you won’t see is for downloaded items.
- In iCloud: The In iCloud status icon
tells you that the folder or file is only in iCloud. You must be connected to the Internet to work with the item, unless you download it to your Mac. Control-click the file, then choose Download Now. - Ineligible: The Ineligible status icon
tells you that the folder or file could not be stored in iCloud. This is usually because you don’t have enough iCloud storage. To learn more about freeing up storage, see Optimize storage on your Mac. - Downloaded: The Downloaded status icon
tells you that the folder or file is up to date between your Mac and iCloud and you can view or edit it immediately, with or without an Internet connection. - Waiting to Upload: The Waiting to Upload status icon
indicates that the folder or file is not yet stored in iCloud. - Out of Space: The Out of Space status icon
indicates that the folder or file can’t be stored in iCloud because there isn’t enough iCloud storage.A similar icon can also appear next to iCloud Drive in the sidebar, where it indicates that iCloud storage is full. - Pie chart: The pie chart status icon
gradually increases from clear to dark as the files are transferred.The same pie chart can also appear next to iCloud Drive in the sidebar, where it indicates the overall progress for files transferring to and from iCloud Drive.
The status bar at the bottom or top of the Finder window displays the number of items in the disk or folder, and the amount of available disk space. If you don’t see the status bar, choose View > Show Status Bar.
