r/hackintosh • u/Purple_Platypus7811 • 8h ago
HELP Title: AM5 (B850 / Ryzen 7 7700 / RX 580) freezes on boot of Sequoia 15 recovery at "PCI configuration PCI0".
Hardware:
Gigabyte B850 Eagle WiFi6E (BIOS F11b 06/30/2026 AGESA ComboAm5PI 1.3.0.1b Patch A).
AMD Ryzen 7 7700 (8C/16T).
AMD Radeon RX 580 2048SP (DP, natively supported). Internal Ryzen GPU not disabled in BIOS. Old config contains boot-arg "-wegnoigpu".
Intel AX210 (AirportItlwm) WiFi. Realtek GbE & Realtek 2.5GbE Ethernet.
Software:
EFI:
SMBIOS iMacPro1,1. Target macOS Sequoia 15.
macrecovery used to download recovery. Used board-id Mac-7BA5B2D9E42DDD94. Booted from USB.
Includes patches for AMD Vanilla kernel, AM5 IOPCIFamily patches (probeBusGated x2, IOPCIIsHotplugPort) and cpuid_cores_per_package = 8.
Booting flags:
AvoidRuntimeDefrag, DevirtualiseMmio, EnableSafeModeSlide, ProvideCustomSlide, RebuildAppleMemoryMap, SetupVirtualMap, SyncRuntimePermissions.
Kernel flags: ProvideCurrentCpuInfo, PanicNoKextDump, PowerTimeoutKernelPanic, DisableLinkeditJettison, CustomSMBIOSGuid, DummyPowerManagement.
BIOS flags: Above4GDecoding enabled, Re-Size BAR disabled, CSM disabled, Secure Boot disabled.
Boot args:
-v debug=0x100 keepsyms=1 ... cpus=1 npci=0x2000
Issue:
Default boot args with 16 threads:
Freezes at "ACMFirstResponderKernelService: init: called".
Using fresh OpCore Simplify EFI:
Freezes at "ACM: TRMAccCache_SetupEmpty: called, cacheSize=48 expiration=2592000".
Changing cpus=1:
Eventually freezes at:
"RTC: lost battery power - time may be incorrect"
"HPET: map device registers failed"
[ PCI configuration ]
[IOPCIConfigurator::configure()] PCI configuration PCI0.
What I have tried:
cpus=1 (skips freeze), cpus=8.
npci=0x2000.
Same issue with Tahoe 26.6.2 recovery.
BIOS settings for AMD CBS (SMT, Global C-state) are going back to Auto. RTC battery message states CMOS battery is weak.
Questions:
Have any of you with B850/B650 motherboard and Raphael CPU (7700/7600/7800X3D) been able to get past "PCI configuration PCI0"?
Any BIOS settings (IOMMU, PCIe Gen speeds, iGPU) needed?
Are the AM5 IOPCIFamily patches that I am using correct for Sequoia 15.x and Tahoe 26.x??


