With GPU prices near the stratosphere, now is a great time to get your PC card flashed to work in your Mac. We WROTE all of the 3rd party rooms for these. Let us make your life easier. If you want a boot screen, now is the time.

We carry very few cards in stock now due to the prices, so are able to get to flash jobs in 1-2 days. We have also expanded to 460 as well as ALL 480 and 580 cards.

​Do it !

As most probably know already, the surging value of Bitcoin has driven GPU prices into the stratosphere. The RX580 is a great Mac 4,1/5,1 card, but sadly is also a great mining card. Once AMD stopped making new ones, prices skyrocketed. We continue to get a few in, but at current prices they are pretty expensive. With any luck prices will return to normal some day soon.
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​Meanwhile, now is a GREAT time to get your existing cards flashed. With greatly reduced card sales, we have more time for flash jobs. Most are in and out in 1-2 days. Please test the card first, flashing doesn't fix dead cards.

Can report that Big Sur  works great on the 4,1/5,1. Just need a newer GPU ! WiFi card needs to be updated as well. 

Best way to do it is run the install on another machine that supports natively. I have done this using a TB enclosure with PCIE drive.

There are apps to make this easier. But once installed, all that is required is:

sudo nvram boot-args="-no_compat_check"

​This allows normal function. If you do an NVRAM reset, you will need to reapply.

In 10.15.5-10.15.7 you need to apply the "fix". 

​This is easier on the cards that have a BIOS switch. 

Best news is that Apple fixed the conflict for Big Sur. So no fix needed