Similar problem here...

When I try to run any version of Octane Render Standalone 3.08 thru 3.08.5 I get the same error message:

"Windows can not verify the digital signature for this file. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or ...

JarretMoody;

If you are familiar with any silver tower Mac Pro 5.1, 4.1, or 3.1; you can be running dual (or triple, or quad) GTX 1070s (or GTX 1080tis) with multi-boot Windows7/10/OSX on any dual-hex Xeon Mac Pro you can get your hands on, tomorrow! Cost: Free!
(Just the cost of the GTX cards and ...

I posted this somewhere else, hope more Mac users find this...

I’m using a 2011 MacBook Pro 17” w/ quad core i7 2.2 GHz and 512 SSD. I have a GTX 980 ti plugged into a GDC Beast w/ ExpressCard34 connector into the MBP. It runs Octane like a beast, and everything just worked after I toggled one of ...

Refracty;

I am using (and have tested) many different combinations of GTX 570 2.5GB, GTX 580 3GB, and GTX 590 2x1.5GB cards in my (6) 2006-2012 Mac Pro dual Xeons w/ dual boot OSX/Windows... (I prefer blower style cards, and Macs Fan Control from Crystal Idea solves all heat issues)

Yes, they all ...

OctaneBench 3.06 breaks my Fermi cards GTX 570, GTX 580, & GTX 590!
EDIT: 3.06.2 seems to run fine w/ all my Fermi cards, once again. I got new PSU and cables, and updated all drivers. Now they can overclock above 20% again.

Also Octane 3.08 is running super stable with all my GTX cards, including ...