I decided to place my Lightroom catalog (along with smart previews) on my 20 GB Creative Cloud drive as i use more than one computer. I usually update the catalog on my Windows machine. However, when i open the same catalog in Lightroom on my Macbook, a duplicate of the LRCAT file is automatically created on my CC storage drive. Can someone tell me why this happens? This is beyond frustrating!
Firstly, I would suggest that Creative Cloud is not the right place to store the Catalog, as there are permission issues over the Cloud .
Also are you trying to launch Lightroom with the Catalog still saved on Creative Cloud ?
If yes, then try moving the Catalog to Local Disk once and then launch Lightroom and see if the duplicate catalog is created or not ?