Hi,
I'm running OSX El Capitan beta (10.11.1 (15B17c)).
The game doesn't show any GUI (not even an empty window / black screen), just the game icon which stays a couple of seconds, then disappears. The game seems to silently crash or exit at launch.

Am I the only one having this issue ?
Is there a known solution ?

thx in advance

ps : "OSX 10.11" not being in the OS dropdown on god.com, I can't actually file a bug report properly. :(

This is very likely to be due to Xquartz being incompatible with the new rootless security feature in El Capitan.

There is another thread on this.

http://www.gog.com/forum/planescape_torment/mac_the_application_x11_could_not_be_opened

I already filed a bug on the issue and upstream appears aware of the issue so a fix should hopefully arrive soonish.

In the meantime, if you want to play this game and every other one GOG provides for OS X using Wine (which is quite a lot of them) you'll need to disable rootless.

However I would not recommend doing so as disabling security measures is generally a bad idea. However consulting your web search engine of choice will tell you how to do it, I will not link to it directly as I do not wish to encourage lowering overall security on any machine.

Same issue has happened to me which is really annoying as before I updated the OS today it was working fine and I only just bought it today too. :(