Set your default GnuPG key pair on OS X 10.9
Let's say that you created more then one key pair. From now on, you would like to use the key with the id 10X01Y07 as your new default or primary key.
Open up Terminal (Application»Utilities»Terminal)
TextEdit comes preinstalled on your machine and offeres you a gui but feel free to open following document with a different text editor
open -a TextEdit ~/.gnupg/gpg.conf
Search for the text snippet “default-key”.
Remove the comments character (#) if needed. Now add your key id. e.g. “default-key 10X01Y07” after default-key
Save and close the file
Come back to the Terminal and test your new default key e.g.
gpg --clearsign /Users/fiona/Documents/helloworld.txt
The following output should confirm your new settings.
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