# installing psychtoolbox mac os x v10.9.4

**URL:** <https://psychtoolbox.discourse.group/t/installing-psychtoolbox-mac-os-x-v10-9-4/346>\
**Category:** Uncategorized\
**Created:** [August 4, 2014, 10:57pm UTC](https://psychtoolbox.discourse.group/t/installing-psychtoolbox-mac-os-x-v10-9-4/346 "2014-08-04T22:57:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\
**Post date:** [August 4, 2014, 10:57pm UTC](https://psychtoolbox.discourse.group/t/installing-psychtoolbox-mac-os-x-v10-9-4/346/1 "2014-08-04T22:57:54Z")

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I get this message:

Error using DownloadPsychtoolbox (line 198)

Your operating system is not supported by

DownloadPsychtoolbox.

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**Author:** ![elladawu](https://avatars.discourse-cdn.com/v4/letter/e/71c47a/32.png) [@elladawu](https://psychtoolbox.discourse.group/u/elladawu)\
**Post date:** [August 4, 2014, 11:24pm UTC](https://psychtoolbox.discourse.group/t/installing-psychtoolbox-mac-os-x-v10-9-4/346/2 "2014-08-04T23:24:13Z")

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my guess is that you are using an old or outdated DownloadPsychtoolbox.m file.  
  
make sure you are using the one you can find on the "Downloading and Installing the Toolbox" page of the official PsychToolbox website:  
  
[Psychtoolbox Wiki: Psychtoolbox-3](http://www.psychtoolbox.org)
 

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   [Psychtoolbox Wiki: Psychtoolbox-3](http://www.psychtoolbox.org)
Psychtoolbox-3 Psychophysics Toolbox Version 3 (PTB-3) is a free set of Matlab and GNU/Octave functions for vision research. 

 
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 [View on www.psychtoolbox.org](http://www.psychtoolbox.org)
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