Dear Allin,
As you suggested, I installed the Gretl using the new admin account, then logged in with
my old account and tried to open the Gretl from the application folder, and it works.
Thank you sooooooo much
Much appreciated.
Regards,
From: Allin Cottrell <cottrell(a)wfu.edu>
Date: Saturday, 5 November 2022 at 8:53 am
To: Gretl list <gretl-users(a)gretlml.univpm.it>
Subject: [Gretl-users] Re: Installation failed
On Thu, 3 Nov 2022, Fazeel Jaleel wrote:
 Dear Allin
 I am using the same Macbook and the
 • Gretl was working fine but an earlier version of macOS
 • Then I tried to instal macOS with Ventura (13.0) and the Gretl
 was working fine too
 • Then I tried to instal Gretl latest update (Nov 1st release) on
 the installing process a message came That Gretl tried to access
 your folder (something similar to) but I accidentally pressed NO
 button
 * Since then, the same error message pops up every time try
 installing the Gretl 
What you tell us implies the following:
* There's no inherent incompatibility between gretl and Ventura.
* The problem is not specific to the latest release (since you told
us earlier that the older version of gretl won't install now
either).
What I infer is that there's some setting in your user account on
Ventura that is banning gretl installation (presumably connected
with your inadvertently clicking on "No" as you describe).
So I'm going back to one of my previous points:
 I've heard of some Mac users who encountered failures trying to
 install certain application programs (not gretl), but managed to
 do so by creating a new administrator account and installing the
 software using that account. 
Try creating a new user account on your Mac, with admin rights, and
see if you can install gretl from there.
Allin