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
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
General download and setup instructions:
http://psychtoolbox.org/download.html
Thank you… but I’m still having problems with the download
Could you please explain step by step what I have to do? Sorry 
you have to explain what your problems are. what have you tried and where did it fail?
You should not run DownloadPsychtoolbox(). see the instructions on our webpage: http://psychtoolbox.org/download.html#Mac
