Anže,

I managed to compile therion from source yesterday, on an Apple Silicon Mac, but with the previous version of macOS Sequoia 15.6.1.

I used the v6.3.4 tag (17059ab27ce491f1edac150da2b7e2011f79b800).

Are you using the CMake build method?

I did install the dependencies via Homebrew (taken from the `ladislavb/homebrew-therion` repository):

    brew install BWidget cmake catch2 fmt freetype ghostscript imagemagick lcdf libjpeg libpng pkg proj tcl vtk wxwidgets zlib
    brew install --cask xquartz

Olly

> On 30 Oct 2025, at 07:52, Anže Abram <anze.abram@gmail.com> wrote:
>
> Greetings.
>
> I've been trying to reinstall Therion on a new M-series macbook on the newest OS (Tahoe) but have run into several 'dead ends'.
>
> (1) First I tried the homebrew method, but I ran into the same issue as several others. The whole homebrew route seems to be broken currently.
>
> https://github.com/ladislavb/homebrew-therion/issues/15
>
> (2) I tried to compile it from source, but it gets stuck while trying to compile Loch with the following error:
>
> In file included from lxSetup.cxx:39:
> ./lxData.h:35:10: fatal error: 'vtkPolyData.h' file not found
>    35 | #include <vtkPolyData.h>
>       |          ^~~~~~~~~~~~~~~
> 1 error generated.
> make[1]: *** [lxSetup.o] Error 1
> make: *** [loch/loch] Error 2
>
> Does anyone know of a solution, how to tackle any of these problems by chance? Thanks in advance,
> Anze
>
> Anže Abram
> Ulica bratov Učakar 84, 1000 Ljubljana
> SI - Slovenia
>
> M +386 41 480 906
> @ anze.abram@gmail.com
>
> Naše oči je zalila
> lava goreča.
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