Hi
Currently there is no DAC driver for MQX.
You need to either use the Processor expert DAC driver or adapt the DAC 12-bit demo driver provided with CodeWarrior for MCU 10.5, Such demo is in the next path:
C:\Freescale\CW MCU v10.5\MCU\CodeWarrior_Examples\Kinetis_Examples\k60\dac12bit_demo
Have a nice day,
Daniel