Unable to open a test swap.
To avoid data loss, please check the location and permissions of the swap directory defined in your Preferences (currently "/Users/ggdiva/Library/Application Support/Gimp").
Failed to create thumbnail folder '/Users/ggdiva/Library/Application Support/Gimp/cache/thumbnails/normal'.
that seems related with the other message :
since gimp has no permission to use swap space may fail to create a thumbnail cache
Still there is something strange (swap space should be used only when RAM is insufficent, but should be not needed much ram to create thumbnail)
But on the other hand you seems to use a telegraph to send messages:
if you are so sparingly with words and details for sure you can not hope for more help
To avoid data loss, please check the location and permissions of the swap directory defined in your Preferences (currently "/Users/jowllr/Library/Application Support/Gimp").
Processor Name: Intel Core i7
Processor Speed: 2.8 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 16 GB
Processor Interconnect Speed: 4.8 GT/s
How do I fix this?