Im new to this whole thread thing, so be gentle please. I am running on an iMac late 2013, 2.7Ghz Intel core i5, 16G ram, Intel Iris Pro 1536Mb. My OSX is 10.12.5.  I was able to run ES with disharmony a while back, maybe 6 months ago (??), and now it gets through the splash screens, and as soon as the title screen for ES (no mention of disharmony at all), it goes straight to home screen. In the DLC area on Steam, there is no mention of Disharmony anywhere. What I see is:

   However, when I go to the store page, I confirm I own disharmony as it says it's in my library.... but it isn't. 

Weird thing is, as I have bootcamp, it downloads fine on my windows side and runs flawlessly. This tells me the issue is not with the video card being intel, as both use the exact same card. 

I looked at my log file which looks like :

Player.log.log

One other thing I have found is that the log file looks for a directory called "Public_xp1". However there is no folder called this, just "Public". Changing the name of the "Public" folder to "Public_xp1" will make the game run, however then I get NullException errors on everything I mouse over. So there is something either missing, like the disharmony dlc that wont download, or there is an error in the file structure in the way steam is downloading the files to the Mac. (I worked for Apple 5 years as Tech support on Macs, so I've pretty much taken it as far as I can) Any help or suggestions would be appreciated. I've deleted, reinstalled, turned of the option for overlay, tried running windowed, and verified files until I'm blue in the face. Any ideas?

Same deal here on macOS Sierra 10.12.5 havent played in a while not sure since when.

Tried the relevant stuff in the Mac torubleshooting Thread from years ago, still no joy.

I also saw the reference to missing Galaxy Generator files non existent directory: 

~/Library/Application Support/Steam/SteamApps/common/Endless Space/Endless Space.app/Contents/Public_xp1

note  similar path ~/Library/Application Support/Steam/SteamApps/common/Endless Space/Endless Space.app/Contents/Public exists

So I created a Symlink from Public to Public_xp1 and that would also allow me get past the splash screen to the menu, but similar missing resource errors then occurred.

Also had purchased the disharmony DLC which is not preset in Steam when viewing installed DLC for Endless Space....

I know you just released a new version and hav dev resources tied up there, but I thinks its incredibly poor support to 1) have a completey broken game on Steam and 2) not have ny response or real info on your support site (to which most links i follow 404)

Any help here?