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[Bug]: Kernel Panic - sequoia wont boot

7. September 2026 · von @friendlycatt

bug

Mac model / Mac-Modell

T2 — MacBook Pro 13-inch (2020, 2 thunderbolt 3 ports, Intel)

Target macOS version (if it is about malicious forks, typosquatting sites or security vulnerabilities, write - instead) / macOS-Zielversion (falls es um Typpfehler-Webseiten, Typpfehler-Repository oder Sicherheitslücken handelt, schreiben Sie stattdessen ein - )

26.6

OpenCore Legacy Patcher T2 version (Please state the version clearly, not state as version new or something. / Bitte die exakte Version nennen, nicht nur etwas oder neu.)

4.0.0.18003.3 - 4.0.0 alpha 18.3.3

Issue type / Typ Fehler

Kernel panic

Description / Beschreibung

with the latest version , tahoe installer will always have kernel panic it never boots to installer , and the installed sequoia wont boot from oc efi either .

Opencore.zip
zip includes logs from both tahoe and sequoia , tahoe always has kernel panic and sequoia freezes while booting then reboots

#289 i have tried boot-args from here and RestrictEvents.kext from a post too

Steps to upload the logs of the kernel panic if any (if not, you can skip this step or write -) / Schritte zum Hochladen der Protokolle des Kernel-Panics, falls vorhanden (falls keiner, dann Sie können das überspringen oder einen - schreiben)

No response

Panic log (if any) / additional notes (if any) / Panikprotokoll (falls einer) / zusätzliche Notizen (falls einer)

Kommentare

@Medelcartelinc · 8. September 2026

Hi @friendlycatt! 👋

Thanks for providing the detailed OpenCore log files! Inspecting opencore-2026-09-07-144944.txt reveals the exact cause of both the Tahoe installer panic and the Sequoia boot freeze on your MacBook Pro 13" 2020 (MacBookPro16,3):

1. agdpmod=pikera on an iGPU-only model

Your MacBookPro16,3 only has an Intel Iris Plus Graphics (iGPU) and no discrete AMD GPU.
In the logs, your boot-args include agdpmod=pikera:

• agdpmod=pikera is specifically intended for discrete AMD Navi/Polaris GPUs.
• On an Intel iGPU-only MacBook, agdpmod=pikera disrupts AppleGraphicsDevicePolicy / Intel framebuffer initialization, causing WindowServer and the display controller to freeze or panic.

2. Residual NVRAM boot-args

Notice these lines in your logs:

OC: Not deleting NVRAM 7C436110-...:boot-args, matches add
OCVAR: Setting NVRAM 7C436110-...:boot-args - ignored, exists

OpenCore preserves existing NVRAM variables unless explicitly cleared. The custom arguments you tested (io=0xffffffff, -liludbgall, etc.) are persisting across boots and preventing clean driver startup for both Sequoia and Tahoe.

---

How to fix it:

1. To boot back into Sequoia immediately:

   • Note that macOS 15 Sequoia is natively supported by Apple on MacBookPro16,3! You don't actually need OpenCore to run Sequoia on your machine.
   • Simply restart, hold Option (Alt), and select your native Macintosh HD volume directly (instead of EFI Boot).

2. Perform a Clean NVRAM Reset:

   • At the OpenCore boot picker, press Space.
   • Select Reset NVRAM and let the Mac restart to clear the stale boot arguments.

3. Update to OpenCore Legacy Patcher T2 4.0.0.18004.1 for Tahoe:

   • In newer builds, agdpmod is automatically tuned (vit9696 for iGPU models like MacBookPro16,3, and pikera only for dGPU models).
   • Rebuild and install OpenCore to your EFI partition.
   • For the Tahoe installer, standard clean boot-args will apply automatically without conflicts:

     -v rddelay=10 igfxfw=2 igfxonln=1 -disable_ext_panics -no_compat_check -revbeta agdpmod=vit9696 forceRenderStandby=0 revpatch=sbvmm ipc_control_port_options=0 AMFIPass=0x1
     

Give an NVRAM reset + OCLP update a try and let us know how it goes! 😊

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