You cannot delete a Catalog from within Capture One. This can only be achieved from the Finder/Explorer (Mac/Windows). Deleting a Catalog with source images inside will also result in the loss of those files. In the Library, you can check whether a Catalog has any source images inside.
- Navigate to the Catalog (<name>.cocatalog) file in the Finder/Explorer (Mac/Windows), click on it, and select Move to Trash/Recycle Bin (Mac/Windows).
- The Catalog along with the previews and adjustments will be moved to the system trash. Any source image files inside the Catalog (if there are any) will also be moved to the trash as well.
- Emptying the trash/recycling bin will permanently delete the Catalog (and potentially any source image files in the Catalog). This action cannot be undone.