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Set your default key 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 00X00Y07 as your new default key.

Open up Terminal (Application»Utilities»Terminal)
TextEdit comes preinstalled on your machine and offeres 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 and add after default-key your key id. e.g. “default-key 00X00Y07”
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