Hi Chris, thanks for the quick reply! also happy to hear that you are working on this. If there is anything I can do to help I would love to. I must add that I am not a programmer though :)

In the meantime what you can try is go to the folder that contains the dylibs (engine/plugins/octane ...

Is there any news on the progress on this issue? Maybe somebody has another idea of what to do? It would be really amazing to use this with Unreal

Ok so: by disabling a Safari preference I have managed to download a zip file. I also did the same using Chrome. File size of 956,4 MB.
In both cases unzipping with both Keka and Archive Utility into /Applications/UE_4.26/Engine/Plugins gives the same error message:

Plugin 'OctanePlugin' failed to ...

That IS the error message. I will quote it again:

Plugin 'OctanePlugin' failed to load because module 'OctanePlugin' could not be loaded. There may be an operating system error or the module may not be properly setup.

the file indeed comes from this link: https://render.otoy.com/forum/viewtopic ...

I get this message from Unreal after following instructions and placing the downloaded folder into the corresponding UE4 plugin folder:

Plugin 'OctanePlugin' failed to load because module 'OctanePlugin' could not be loaded. There may be an operating system error or the module may not be properly ...

I have exactly the same problem with Unreal Engine 4.26.1 on osX 11.2.3. Is there a solution to this? Also Somebody at Otoy might want to complain to Apple because the files downloaded from Otoy are "unable to be verified to be malware free" by Apple which I think is crazy beyond belief!!!!