The process to add keyboards in Yosemite has changed a bit, so because I could not find screen caps on the web, I am adding my own.
Activate Keyboards
Yosemite and Mavericks
- Go to the Apple menu and open Systems Preferences.
- Click the Language and Region (U.N. flag icon)
System Preferences in Yosemite (OS X 10.10) - Click the Keyboard Preferences button at the bottom of the window to open the keyboard preferences
- In the next window, click the Input Sources tab. Click Show Input menu in menu bar at the bottom of the window.
- Then click the + key to open available keyboards by language.
Click the + link at the bottom left to see list of available keyboards.
- In the next window scroll to languages you are interested. Highlight any keyboard you want to activate with the mouse, then click the Add key. Repeat as needed for each keyboard.
The Dvorak keyboard highlighted and a preview is shown. Click Add button to add keyboard
Location of Certain Keyboards
- English has U.S. Extended, Dvorak and keyboards for different countries
- Others has Unicode Hex Input