# Help with the download **URL:** \ **Category:** Programming Help\ **Created:** [May 31, 2024, 7:43am UTC](https://psychtoolbox.discourse.group/t/help-with-the-download/5367 "2024-05-31T07:43:09Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![chiarafucito](https://avatars.discourse-cdn.com/v4/letter/c/919ad9/32.png) [@chiarafucito](https://psychtoolbox.discourse.group/u/chiarafucito)\ **Post date:** [May 31, 2024, 7:43am UTC](https://psychtoolbox.discourse.group/t/help-with-the-download/5367/1 "2024-05-31T07:43:09Z")
Hello! I recently started using Matlab for a uni course. My professor asked us to install Psychtoolbox, but I’m using a MacBook Pro (first generation 2012) running on Catalina 10.15.7 I’m using an older Matlab version (R2022a) and I read online that the only PTB version that works is the 3.0.17 one. I tried installing it, but I can’t figure out how to do it ☹ I would kindly appreciate any help Thank you so much in advance p.s. sorry for my bad english ---
**Author:** ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\ **Post date:** [May 31, 2024, 5:19pm UTC](https://psychtoolbox.discourse.group/t/help-with-the-download/5367/2 "2024-05-31T17:19:53Z")
v3.0.18 is the last one tested to work on Catalina, but the untested working assumption is that the current v3.0.19 continues to work on it, although this is no longer tested or supportable in case of trouble. The download link for the current 3.0.19.11 zip file is here: [https://github.com/Psychtoolbox-3/Psychtoolbox-3/releases/download/3.0.19.11/3.0.19.11.zip](https://github.com/Psychtoolbox-3/Psychtoolbox-3/releases/download/3.0.19.11/3.0.19.11.zip) General download and setup instructions: [http://psychtoolbox.org/download.html](http://psychtoolbox.org/download.html) ---
**Author:** ![chiarafucito](https://avatars.discourse-cdn.com/v4/letter/c/919ad9/32.png) [@chiarafucito](https://psychtoolbox.discourse.group/u/chiarafucito)\ **Post date:** [June 2, 2024, 8:47am UTC](https://psychtoolbox.discourse.group/t/help-with-the-download/5367/3 "2024-06-02T08:47:28Z")
Thank you… but I’m still having problems with the download Could you please explain step by step what I have to do? Sorry 😢 ---
**Author:** ![dcnieho](https://avatars.discourse-cdn.com/v4/letter/d/779978/32.png) [@dcnieho](https://psychtoolbox.discourse.group/u/dcnieho)\ **Post date:** [June 2, 2024, 9:28am UTC](https://psychtoolbox.discourse.group/t/help-with-the-download/5367/4 "2024-06-02T09:28:34Z")
you have to explain what your problems are. what have you tried and where did it fail? ---
**Author:** ![chiarafucito](https://avatars.discourse-cdn.com/v4/letter/c/919ad9/32.png) [@chiarafucito](https://psychtoolbox.discourse.group/u/chiarafucito)\ **Post date:** [June 2, 2024, 10:31am UTC](https://psychtoolbox.discourse.group/t/help-with-the-download/5367/5 "2024-06-02T10:31:00Z")
This is what comes up when I try to run the program ![Schermata 2024-06-02 alle 12.30.40](https://global.discourse-cdn.com/free1/uploads/psychtoolbox/original/1X/8fd9e0c20efa4c0c4b2edfe20a3e30cf3947a5cf.png) ---
**Author:** ![dcnieho](https://avatars.discourse-cdn.com/v4/letter/d/779978/32.png) [@dcnieho](https://psychtoolbox.discourse.group/u/dcnieho)\ **Post date:** [June 2, 2024, 10:56am UTC](https://psychtoolbox.discourse.group/t/help-with-the-download/5367/6 "2024-06-02T10:56:14Z")
You should not run DownloadPsychtoolbox(). see the instructions on our webpage: [http://psychtoolbox.org/download.html#Mac](http://psychtoolbox.org/download.html#Mac)