After finishing both Return and Dragonfall I was inspirited to create my own content. Alas! My run was thwarted since the very first click of a button. Or non-click, I should correct.
It all happend thus:

1. Launched Shadowrun Dragonfall's - Director's Edition.
2. From within the opened game, on one of the the Menu screens, I clicked the Launch Editor button.
3. That's the end of my short run. Nothing ever happened. The clicks go unanswered and the Editor does not launch.

I searched the database for something like this but all the other similar topics regarding the Editor do not address it not launching at all.

Now, my questions are:
A. Anyone else has encountered this same problem or am I alone in an unforgiving universe?
B. Is the Editor not included in the package? (Sort of like "Shadowrun Returns", which is included in "Dragonfall" so the latter one will work as stand-alone but it's not actually accessible from the game).
C. If the Editor is supposed to work, is there a way to fix it not launching?

My specs:
iMac 21.5-inch, Late 2012
Processor 2.7 GHz Intel Core i5
Memory 8 GB 1600 MHz DDR3
Graphics NVIDIA GeForce GT 640M 512 MB
Software OS X 10.8.5 (12F45)

Dragonfall's version:
2.3.0.8 (wich as of today, December 02 of 2014, is the up-to-date version).

Thanks for your time and knowledge-sharing hearts.
:)

I've got the exact same problem. I can click as much as I'd like but no editor launches. There does not appear to be an editor program even installed on my computer (I even checked inside the Dragonfall.app package). The .dmg file I downloaded from GoG via the GoG.com Downloader only contained the Dragonfall app (v2.3.0.8), no separate editor was included.

I'm running Mac OS X 10.8.5 on a Mid 2012 MacBook Pro.

It's worth noting, I have the original Shadowrun Returns through Steam (without the Dragonfall expansion), and its editor runs fine. Although for the Steam installation, the Shadowrun Returns app and the Shadowrun Editor app are separate apps installed in the same directory.

Exact same thing with me I have looked around and it does not seem to even contain an editor.
I honestly have no idea what to make of this and am kinda disappointed about the whole thing its honestly as if they just kinda forgot to put it in.

Same problem : upon not finding one in the install or app package, I wasted quite a bit of time digging around to check whether the feature list and spec requirements for the game could clarify whether an SRR Editor for Mac actually did exist !

So, I take there *should* be an editor, but it is missing from the GOG distribution, is that right ?

Not sure it really seems like it though. I will check on windows in a little to see if its at least on there.

I have the same problem, and have reinstalled to make sure it wasn't a simple user error snafu. I haven't found anything on it elsewhere - if anyone has any answers, please post!

Not sure if everyone ITT is on a Mac, but... I'm not on a Mac, but unstead on Win7.

I just wanted to confirm the question; is there an editor? Is it missing?

Yes, on both my copy of Returns and Dragonfall, the editor starts right up. So there is are editors and they aren't missing (at least on the Win install).

Wish I could assist on the Mac issue but have no Mac experience. Sorry.

I sure hope the editor is coming to the Linux version, too. I would certainly not have purchased the game if I'd known the editor would not function on Linux. I don't even keep a windows partition anymore.

Why hope? See the post above yours for how mgoedde solved the issue with the Mac editor.

This does not seem to be the case with the Linux version, or at least not on my machine. I wasn't able to alt+tab into an editor window from the game after clicking the editor button... BUT, SRR also seems to crash my window manager every time I start it and keep going (whether I'm using Compiz, Metacity, or XFCE), so I have no way of checking the process list without shutting down the game. I can tell you the editor does not persist after I've closed the game, if it was ever begun.

Also just (at edit time) tried the windows version in a VM.... instacrash, predictably. (recent games rarely work virtualized, I find.) So, I doubly hope that they get it working on Linux. I basically was interested in SRR for the robust editor (hard to find folks to sit around a table to play an RPG these days), and I'm not in love with the prospect of letting a proprietary OS have a partition on my drive.

Final edit:

Linux issue is resolved, see this post if you're looking for bread crumbs. Was a 64 bit/32 bit compatibility issue.
http://www.gog.com/forum/shadowrun_series/editor_on_linux/post2

PROBLEM SOLVED
Poster mgoedde came up with the solution to all this.
As he mentions in his post up there, the new versions of the game take care of the Editor not launching (for the good reason that it didn't exist prior to version 2.4.0).

However the editor still has issues, so this is a heads-up to anyone that would like to know if it works in order to purchase the game.
For one, on the newest version 2.5.0.17, the Editor still launches on the back of the game, so you never see it unless you play the game windowed.
Also, while the Editor opens and saves your files just fine (I already tested that several times), it does not load dependencies or any other game element needed for the scenarios, like those mentioned on the tutorials available at the developer's site.
In brief, you can load the Editor but you cannot create any content.

So there you go. The topic is solved but the functionality of the Editor is not. Which is not GOG's fault nor their responsibility but Hairbrained Schemes'.
We win some, and loose some more, such is life. Oh well...
:)