We may be able to suggest something, but let's start with some basic information about your system:
* Adobe product and version number (Latest CC 2018 is now 19.1.1)
* Operating system and version number
* Computer hardware, such as Mac model, year, GPU; amount of RAM, storage capacity (HDD or SSD) and free spacee.
Finally got a human on the phone, though in India, was very helpful. Problem was associated with graphics card in my mac desktop. Thanks.
Save humanity. Destroy texting phones.
Preserve Coastal Heritage
The NC Coastal Heritage Association
What did they do to fix it?