I am running a late 2009 27"iMac and never had any issues till the upgrade to LR CC. Now when every I run the Photomerge option for either HDR or panorama everything is fine till I try and "merge" and then it takes 30' for the process to complete and "save" the dng file. The same thing happens when using the Nik plugin's. When I use HDR Efex everything is fine till I hit "save" and then it takes 30-40' to save the file. While it is trying to save the image LR craws to a halt and it might take 5' to open a preview. Any help would be appreciated.
How big are the images?
How many images in the panorama?
How much RAM do you have in your computer?
What operating system are you using?
They are 3 raw files form Sony A7R (I have never a issue with LR5 "saving from HDR eFex in LR5)
I have 16 GB of RAM