[Mac][High Sierra 10.13.1] Game basically unplayable graphics issues

[Jayfarm]

Running on the Late 2014 4K retina 27" iMac with a recent update to High Sierra.

a) When game first launched, it glitched and machine actually went to sleep. After I woke it up I was able to start a colony.
b) I can't play any levels other than the challenge. When I try to select the new home level the description box appears for just a moment then vanishes. I have tried different graphics settings to no avail.
c) Can't get out of fullscreen mode - If I try to chose windowed or windowed fullscreen it just resets the dialog to show full screen. If I select anything other than 5K resolution I can watch it tick up to full resolution again.

I'm game to provide any additional information, not sure what log files are typical to post.

 

[MikeSlugDisco]

Shall pass this onto Matt. But the very first thought is that your graphics drivers likely need updating.

 

[Jayfarm]

System claims to have no updates available. I did update to High Sierra only a few days ago, but only bought this game last eve so not sure if it worked on previous OS.

Additional graphics info:
AMD Radeon R9 M295X:

Chipset Model: AMD Radeon R9 M295X
Type: GPU
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 4 GB
Vendor: AMD (0x1002)
Device ID: 0x6938
Revision ID: 0x0000
ROM Revision: 113-C773AA-731
VBIOS Version: 113-C773A1-014
EFI Driver Version: 01.00.731
Metal: Supported, feature set macOS GPUFamily1 v3
Displays:
iMac:
Display Type: Built-In Retina LCD
Resolution: 5120 x 2880 Retina
Framebuffer Depth: 30-Bit Color (ARGB2101010)
Main Display: Yes
Mirror: Off
Online: Yes
Automatically Adjust Brightness: No
LA2405:
Resolution: 1920 x 1200
Framebuffer Depth: 30-Bit Color (ARGB2101010)
Mirror: Off
Online: Yes
Rotation: Supported
Automatically Adjust Brightness: No
Connection Type: DisplayPort
LA2405:
Resolution: 1920 x 1200
Framebuffer Depth: 30-Bit Color (ARGB2101010)
Mirror: Off
Online: Yes
Rotation: Supported
Automatically Adjust Brightness: No
Connection Type: DisplayPort

 

[KeWin]

I've got a very similar setup. Also an iMac running High Sierra 10.13.2. I've not experienced such big issues but like I've written in another post in this forum I have run into some problems regarding the ingame shadows.

 

[Jayfarm]

I've tried to uninstall everything, then reinstall via steam, without change.

I've launched without the other 2 monitors plugged in, without change.

After the last reinstall I got a crash immediately upon launch, and emailed it in as directed elsewhere. No idea if just bad luck or if there is something useful in there.

Jay

 

[Jayfarm]

As noted somewhere else I also tried to disable the steam VR/overlay without change.

 

[Captn1Star]

Ive got an amazing cpu that crunches 99% of anything framerate wise thats thrown at it but on High Graphics Settings the game crashes heaps..
Changed to pretty low and all good... Don't know why tried a tonne of things to fix but no luck... GPU fails randomly, not even during a large assault or cluster of ants where you'd expect some issues but just following 1 ant will do it...