Gordo74

It's iMac 15,1 per the Bootpacks config, but I also tried 14,2 because that's what worked on my Z77 build with this card.

Hi Jake, Yes, I attempted that as well. Any of the Kext patches that may be interfering?

Hi All, Thanks for all the hard work on this Bootpack. I updated the BIOS to A22 and set the values as they should be (UEFI Boot as well). I’m having a bit of an issue. I have the installer booting successfully, however, I have an RX 570 8GB that was working fine in my Z77 build with no flags. In this build, when it would normally show the boot screen, it shows only a black screen. Other than that, the system seems to be booting normally. Any ideas with settings I can play with on the bootpack from page 3? I’ve tried deleting Whatevergreen and BCRM fixup (as I’m using a native airport card in a pcie adapter).I have also tried with/without RadeonDeInt in Clover. I've also tried booting with/without Intel graphics enabled. It's a bit maddening because the config seems to be tuned perfectly - it's probably the fastest booting hack I've ever had. Just this last hurdle. Thanks, Mike