I came across this by pure accident but did you know that all of your iOS Keyboard Shortcuts that you create are then stored to iCloud Keychain and can be used in OS X 10.9?

I was in iMessage when I accidentally typed “eag” which is a shortcut I have created to easily insert my work email in iOS. Well I typed that and pressed space and the text autofilled into the message. So then I went ahead and typed other shortcuts I actively use in iOS and sure enough, they all auto-complete very nicely. After noticing this, I went to System Preferences