DiskAid 6 for Mac will let you transfer and copy pictures from your Photo Stream to your Mac via iCloud without any device connected.
To access Photo Stream:
- Launch DiskAid 6 for Mac
- Click the iCloud section
- Select a stream
- Drag pictures to your desktop to make a local copy
TIP: Select any item and press the space bar to preview!
NOTE: You can do the same thing and transfer files and folders to your iCloud compatible Apps!