# Tobii4c with iohub and macintosh

**URL:** <https://discourse.psychopy.org/t/tobii4c-with-iohub-and-macintosh/6940>\
**Category:** Builder\
**Tags:** iohub\
**Created:** [March 7, 2019, 2:22am UTC](https://discourse.psychopy.org/t/tobii4c-with-iohub-and-macintosh/6940 "2019-03-07T02:22:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Bill\_Prinzmetal](https://avatars.discourse-cdn.com/v4/letter/b/94ad74/32.png) [@Bill\_Prinzmetal](https://discourse.psychopy.org/u/Bill_Prinzmetal)\
**Post date:** [March 7, 2019, 2:22am UTC](https://discourse.psychopy.org/t/tobii4c-with-iohub-and-macintosh/6940/1 "2019-03-07T02:22:40Z")

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**Mac10.14**  
**PsychoPy version 3.02**  
**Standard Standalone? Y**  
Use Tobii eye tracker.  
I have not bought a Tobii eye tracker yet but can put my hands on one. I read the eye tracking chapter in the great PsychoPy book. It seems using the Tobii with PsychoPy, IOHub and the YAML file is straight forward but a bit complex. But around my institution, people are discouraging me from trying saying one needs a ~$2000 license from Tobii and/or it will not work with a Mac. I searched this forum and have seen none of that. Has anyone followed the PsychoPy book instructions for a Tobii and gotten it to work? Are my friends working on old information. I don’t want to spend a lot of time if I am doomed to failure in the end, but honestly the Iiohub and the YAML file sees not so hard in the book.

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**Author:** ![Michael](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/michael/32/16_2.png) [@Michael](https://discourse.psychopy.org/u/Michael)\
**Post date:** [March 8, 2019, 3:30am UTC](https://discourse.psychopy.org/t/tobii4c-with-iohub-and-macintosh/6940/2 "2019-03-08T03:30:48Z")

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Hi Bill,

I have not used a Tobii myself, but someone seems to have had success with using one with ioHUB and posted some tips here:

> **[GitHub - aleksandernitka/EyeTracking\_Tobii\_PsychoPy\_IOHUB: a short guide on...](https://github.com/aleksandernitka/EyeTracking_Tobii_PsychoPy_IOHUB)**
>
> a short guide on how to use iohub when using Tobii Eye Trackers with PsychoPy Builder. - GitHub - aleksandernitka/EyeTracking\_Tobii\_PsychoPy\_IOHUB: a short guide on how to use iohub when using Tob...

and someone here got at last part way:

> [@Eyetracking calibration freezes with tobii and ioHub](https://discourse.psychopy.org/t/eyetracking-calibration-freezes-with-tobii-and-iohub/1449):
>
> Hey there, I got a problem with the calibration of the eyetracker using the demo script (iohub/stroop\_eyetracking). After the setup I tried to run the script and came to the point where the calibration starts. On the Screen just before hitting the spacebar the points on the line respond to the eyemovement. When I press the spacebar to continue, the calibration starts but freezes just after the outer ring converges halfway towards the point in the middel. I run the experiment on: -Win 7 -Psyc…