You'll need to transfer this to your other computer(s).
This is the password used to encrypt the signature images.
Alternatively, press ⇧⌘G whilst Finder is active and enter the path above to directly navigate.In Finder, click the Go menu and hold option to show the Library folder.Open the ~/Library/Containers//Data/Library/Preferences folder.Here are the steps to get both the file where the signature is stored as well as the associated keychain entry to a second Mac. This was covered by Aussie Bloke's blog when Lion arrived.
