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If you search hard enough, here and on netkas' forum, you could find few apps that were designed for flashing (usually ATI cards) on OS X.

I'll attach old Zeus app that i have in some random app folder, but i've never used it so i really don't know if it works or not. Don't blame me if something goes wrong.

Saying all that, it is really easy installing Windows on small partition, or spare HDD and boot into it just in case of emergency (to flash GPU or check it's temperatures under load). That way you won't loose hours trying to find app that can flash your GPU on OS X.

Once again, search is your friend 😉
https://forums.macrumors.com/threads/release-ati-flashing-tool.811768/

https://forums.macrumors.com/threads/release-zeus-flashing-tool.877437/
 

Attachments

If you search hard enough, here and on netkas' forum, you could find few apps that were designed for flashing (usually ATI cards) on OS X.

I'll attach old Zeus app that i have in some random app folder, but i've never used it so i really don't know if it works or not. Don't blame me if something goes wrong.

Saying all that, it is really easy installing Windows on small partition, or spare HDD and boot into it just in case of emergency (to flash GPU or check it's temperatures under load). That way you won't loose hours trying to find app that can flash your GPU on OS X.

Once again, search is your friend 😉
https://forums.macrumors.com/threads/release-ati-flashing-tool.811768/

https://forums.macrumors.com/threads/release-zeus-flashing-tool.877437/


Ok Thanks. Though I'll rather use my Mac (When it's built) Because I don't have a spare PC (I don't want to pull the video cards out)...
 
Oh, But come this guy is doing the flashing on his Mac Pro then (Not a PC)...


Yes, the tool is there, but which OS you are using now? That tool hasn't been updated since 2011, and even Cindori recommend users perform flashing in Windows now.
Screen Shot 2018-01-13 at 14.38.13.jpg
 
Ok Thanks. Though I'll rather use my Mac (When it's built) Because I don't have a spare PC (I don't want to pull the video cards out)...

No problem.
Just to be clear, I was talking about bootcamp aka Windows on Mac.
 
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