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4.8256 ERROR- Requested audio device 'auto' that is not available on this hardware

While running the stroop experiment presented in the youtube tutorial, I keep coming across this error:

pyo version 0.8.6 (uses single precision)
4.8256 ERROR Requested audio device ‘auto’ that is not available on this hardware. The ‘audioDevice’ preference should be one of [u’Built-in Output’, u’HDMI’]
**2017-07-27 12:15:00.002 python[1767:94604] ApplePersistenceIgnoreState: Existing state will not be touched. **
New state will be written to
/var/folders/kx/1g30xxhd0mjgxdmtskq5lx6r0000gp/T/org.pschopy.PsychoPy2.savedState

-Within “preferences” I proceeded to change the “audioDevice” from “auto” to “Built-In Output” using the drop-down menu. However, after clicking “Apply” then “OK”, the “audioDevice” reverts back to “auto”. Because of this, I am having trouble running experiments.

Anyone have a solution for this?

I have a 2010 MacBook Air running macOS Sierra Version 10.12.1

Thank You,
Michael

almost the same question