I'm currently having an issue with OctaneServer and can't seem to figure out what's going wrong.
When I start OctaneServer, the application runs in the background, but no login window appears and the preferences are greyed out, so I have no way to log into my account. Because of this, the Octane Blender add-on also can't connect to the server.
Does anyone have a fix?
Can't log in to OctaneServer on MacOs Tahoe
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Hi,
All OctaneRender versions for macOS Apple Silicon are distributed as free Prime license, so you don't need to login/logout, or enter your credentials.
Just make sure to have installed a version supported by macOS 26 Tahoe, from 2025.1 to 2026.2.
If not enough, please write to help at otoy dot com.
Happy GPU rendering!
ciao,
Beppe
All OctaneRender versions for macOS Apple Silicon are distributed as free Prime license, so you don't need to login/logout, or enter your credentials.
Just make sure to have installed a version supported by macOS 26 Tahoe, from 2025.1 to 2026.2.
If not enough, please write to help at otoy dot com.
Happy GPU rendering!
ciao,
Beppe
I have the same issue. Mac OS Tahoe.
No render just a grey checkerboard after installing server and add-on from latest release stable page.
I notice that I was never asked to login.
The server runs and shows a menu item at top bar. The Blender app launches the default Octane templates new… and I hit render and get nothing but checkerbox.
Then I check the Octane render settings - I see Octane is connected shows green… but when I go to render i see nothing. When I try to get a render view in realtime it says another screen is rendering but this is the default project new for octane and I have done nothing yet… I look at the logs and I see this too:
Started logging on 01.06.26 14:38:25
Octane X Prime 2026.3 (15020000)
mModuleDir /Applications/../OctaneServerModulePlugin/
module dir =
device 0
supports d3d11 SS 0
adapterid 0
used for render 1
used for tonemap 1
used for denoise 1
uses priority 1
Server listening on 0.0.0.0:50051
Starting the Octane API twice is not allowed!
So is Octane thinking it’s already got a render window going ?
No render just a grey checkerboard after installing server and add-on from latest release stable page.
I notice that I was never asked to login.
The server runs and shows a menu item at top bar. The Blender app launches the default Octane templates new… and I hit render and get nothing but checkerbox.
Then I check the Octane render settings - I see Octane is connected shows green… but when I go to render i see nothing. When I try to get a render view in realtime it says another screen is rendering but this is the default project new for octane and I have done nothing yet… I look at the logs and I see this too:
Started logging on 01.06.26 14:38:25
Octane X Prime 2026.3 (15020000)
mModuleDir /Applications/../OctaneServerModulePlugin/
module dir =
device 0
supports d3d11 SS 0
adapterid 0
used for render 1
used for tonemap 1
used for denoise 1
uses priority 1
Server listening on 0.0.0.0:50051
Starting the Octane API twice is not allowed!
So is Octane thinking it’s already got a render window going ?
Hi,
Please try to run OctaneBench for macOS:
https://render.otoy.com/octane_eula_only_downloads/d7/b5/80/74/OctaneBench_2025_2_1_macos.dmg
Or try to run OctaneRender Standalone 2026.3:
https://render.otoy.com/octane_eula_only_downloads/000_obd/350/dea102e1/d9/33/81/3d/Octane_X_Prime_2026_3_macos.dmg
If they are running ok, the issue is in your Blender+OctaneRender installation, and my suggestion is to write to help at otoy dot com.
ciao,
Beppe
Please try to run OctaneBench for macOS:
https://render.otoy.com/octane_eula_only_downloads/d7/b5/80/74/OctaneBench_2025_2_1_macos.dmg
Or try to run OctaneRender Standalone 2026.3:
https://render.otoy.com/octane_eula_only_downloads/000_obd/350/dea102e1/d9/33/81/3d/Octane_X_Prime_2026_3_macos.dmg
If they are running ok, the issue is in your Blender+OctaneRender installation, and my suggestion is to write to help at otoy dot com.
ciao,
Beppe