MP 1,1-5,1 Can I use High Sierra on 2009 5.1 with GTX680?

[les24preludes]

My Mac Pro 2009 flashed to 5.1 has a Nvidia GTX680 GPU. I don't know if it's a genuine Mac version - can I tell on System Info?

Will I be able to run High Sierra as it is or do I have to do anything else first? Will I encounter any problems if I start it up with a SSD boot internal disc from my 2010 Mac Pro which runs High Sierra?

 

[tsialex]

My Mac Pro 2009 flashed to 5.1 has a Nvidia GTX680 GPU. I don't know if it's a genuine Mac version - can I tell on System Info?

Yes, Mac Edition and flashed cards have specific ROM Revision, look on SystemInformation, at Graphics/Displays:

Real Mac Edition or compatible cards flashed with Mac Edition firmware:

ROM Revision: 3731

MacVidCards flashed GPUs:

ROM Revision: MacVidCards

Will I be able to run High Sierra as it is or do I have to do anything else first?

Yes, even with a PC version - un-flashed.

Will I encounter any problems if I start it up with a SSD boot internal disc from my 2010 Mac Pro which runs High Sierra?

No, but un-flashed cards don't have pre-boot configuration support.

 

[les24preludes]

Thanks! My GPU says ROM Revision: 3731. So I can go ahead and try out High Sierra with no problems?

 

[tsialex]

Thanks! My GPU says ROM Revision: 3731. So I can go ahead and try out High Sierra with no problems?

Yes, like I wrote before, it would work even not being a flashed one.

 

[les24preludes]

Thanks! You're way ahead of me in technical knowledge, much appreciated.

I suppose the next thing to look at is whether it will run Mojave but I imagine this gets complicated and requires code etc etc.

 

[MarkC426]

Just follow the instructions here:

MP5,1: What you have to do to upgrade to Mojave (BootROM upgrade instructions thread)

Please fully read this first post, you will probably find that you have one or more problems described into the various notes below. Mojave will only install if you have upgraded your BootROM to the current release and your Mac Pro have a Metal capable GPU*. If you are trying to install Mojave...

forums.macrumors.com

You have one of the Mojave supported cards.