This build is by another maintainer and reported to run faster then the normal build.
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Is this supposed to be a mod for another game or is it a stand alone app? There is no executable .app in the archive. What exactly is one to do with this download?
This is stand alone. The executable is called "portal". A file manager should be able to recognize it as an executable. If your file manager needs the .app extension to run it try adding it. Another way is to navigate into the folder with a terminal and start the game like this:
./portal
If for some reason the binary is not permited to be executed you can do:
chmod +x portal
on the file first.
I hope this helps.
Thanks for the reply. I did the chmod +x as you recommended and now when I try to run the Portal app a dialog appears stating "You can't open the application portal becaus the Classic environment is no longer supported." I am running OS 10.6.8
I am getting in touch with my mac build maintainers about this. I am also working on a build manual for macs but it is far from beeing finished.
This means you would have to update your operating system. Another option would be to compile the game for your version of the operating system.