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SMBios 19.x - iMacs 2019

Joined
Aug 9, 2012
Messages
86
Motherboard
Asus Maximus XI Hero (Wifi)
CPU
i9-9900K
Graphics
RX 580
Mobile Phone
iOS
hey how did u manage to get 2 different gpu working. like how your hacke booted in to the corecet gpu acording to the os. i was trying to do that. but i am really stuck and have no more information how to do that. can u tell me ur way? thank you so much
You need to know which PCI slot you want to disable (this is where you have your Nvidia card) and then create an SSDT or modify your DSDT with the following.
Code:
Method (_DSM, 4, NotSerialized)  // _DSM: Device-Specific Method
                {
                    If (LNot (Arg2))
                    {
                        Return (Buffer (One)
                        {
                             0x03                                           
                        })
                    }

                    Return (Package (0x06)
                    {
                        "name",
                        Buffer (0x09)
                        {
                            "#display"
                        },

                        "IOName",
                        "#display",
                        "class-code",
                        Buffer (0x04)
                        {
                             0xFF, 0xFF, 0xFF, 0xFF                         
                        }
                    })
                }
Now macOS will not recognize your Nvidia card, then you must go to windows and disable your AMD card.
You must use 2 different cables connected to your monitor, and depending on what you want to boot, change the input of your monitor.
 
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