Since MacOS updated to Catalina, we had to use the Inkscape 1.0 beta version. In the past, in order to render latex in Inkscape for MacOS, we had to access the script file and add the Latex, dvips and pstoedit path into the PATH variable. But now, with the current form of Inkscape 1.0, which is a .dmg package that is run automatically from the disk image, I haven't found a way of accessing the script file Thus, I cannot render lLtex now. Can someone help?

Under: Extensions > Render > Mathmatics > LaTeX (pdflatex) is still present. Where were you looking for it with your script? I believe it should be there. 

OH, you're correct. That option is grayed out, isn't it? Would you take a moment to file a bug report on that? https://inkscape.org/report Thank you, and please report separately any other issues you discover!

Yeah, it is there, but it is somehow disabled, i.e. I cannot click on it and the letters are grey/faded. What I meant in my post when I refered to the "script file" etc. is a solution along the lines of the following:

https://tex.stackexchange.com/questions/257147/how-to-use-latex-with-inkscape-mac-os-x

But, if there is another solution, it is more than welcome :)

I'd like to ask you to submit a bug report on that. And if you have a moment to look through any of the other Extensions (whether you use them frequently or not) and take note of any others that are similiarly grey/faded out from the menus, I'd appreciate it!  =)

Extensions that are greyed out lack some of the necessary dependencies. Check the log file in your user preferences directory for more info.

@Nathan, I submitted an issue on the gitlab page that you sent me.

@Maren, I went to Edit > Preferences, but I don't exactly understand what I am supposed to do with that. Am I supposed to alter the "User preferences" path, such that it includes Latex? AM I supposed to modify the "User extensions" path? Actually, most of the paths cannot be modified (they are grayed out), e.g. user extensions, user config, user themes, user keys, etc.

As you're using the 1.0beta, you can click on the 'Open' button after 'User config' in Edit > Preferences > System to open the folder where the extension_errors.log file is supposed to be.

These instructions are from another open issue that is the same as yours. You're welcome to follow along and see if this will work for now:

https://gitlab.com/inkscape/inbox/issues/1221

I managed to make it work, by following the instructions of the issue you posted.

Edit: However, it seems that a lot of stuff are rendered the wrong way. E.g. I write $\mathrm{Z}$, which should give me a "Z", and I get "x". I write $\times$ and I get $_1$...

Edit2: There seems to be a very peculiar bug: If you render latex for the first time in a session by typing e.g. $x_1$, which gives "x_1" and is two characters, then the first two characters of any other thing that you try to render will always be "x_1", i.e. if you render $abcd$ you get "x_1cd".