MP 1,1-5,1 Some games crash at launch in Steam with the Radeon Pro VII (and not with the RX 580)

[Mic-M4c]

Hi folks !
I just replaced my AMD Radeon RX 580 8GB by a Radeon Pro VII 16GB in my Mac Pro 5,1 (2010) running Sequoia with OCLP 2.2.0,

I have an issue in games on Steam : some games just crash at launch with the Radeon Pro VII and not with the RX 580. All Root patches have been applied.

Here is a screenshot of the message :

Any help or remark for a better understanding would be warmly appreciate
Thank you !

 

[Macschrauber]

have you read https://dortania.github.io/OpenCore...rently-unsupported-broken-hardware-in-ventura ?

 

[Mic-M4c]

Yes, thank you.

My Radeon Pro VII 16GB is a :

AMD Vega

Vega 56/64/VII (10/20 series)

Supported with patching.

There must be something that has changed between the RX 580 and the Radeon Pro VII that is not supported for some games in Steam (Mac) under Sequoia 15.2 (OCLP 2.2.0), but I don't know what.

On Steam (Mac), here are my games launching fine with the Radeon Pro VII :

• This War of Mine
• Axis and Allies 1942 Online
• Through the Ages "A New Story of Civilization"
• Ticket to Ride

And here are my games crashing with the Radeon Pro VII :

• Brass: Birmingham
• Concordia Digital Edition
• Evolution
• Steam: Rails to Riches
• Terraforming Mars
• Tsuro - Le Jeu du Sentier
• Twilight Struggle
• Unmatched: Digital Edition
• Yellow & Yangtze
• Lonely Mountains Downhill
• Tabletop Simulator