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[Bug]: Memory panic

September 11, 2026 · by @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.)

4.0.0.18009.1

Issue type or recommendation / Typ Fehler oder Empfehlung

Boot failure / Startfehler

Description / Beschreibung

It instantly memory panics while trying to boot to tahoe recovery

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)

Comments

@ma2thiasfiedler · September 11, 2026 · edited

Rollback to 4.0.0 18008 solves this problem.

To do:
Boot from an USB Stick what has an older version of opencore intsalled
Insert this device and turn on your mac
Hold Option / Alt key pressed
select the EFI Icon on the right this should be the USB device
Select your macOS installation - your HDD

After boot uninstall version 4.0.0 18009.1 by using official uninstaller or appcleaner
then install version 4.0.0 18008 and install opencore to your system
Follow the instruction of OCLP T2
After a reboot macOS will boot normally

@jakecaley · September 11, 2026

@friendlycatt this is a issue with the new version. one of the kexts are not working right currently. i got the same thing on mine same model. though rollback will get thaoe to boot again you will just get hit with the mac os isnt comptible message because the kext that is failing prevents the mac os compatibilty message

@albert-mueller · September 11, 2026

@Medelcartelinc

@Kunolobo1 · September 11, 2026

Macbook Pro 2015 13# - worked for me - thanks

Rollback to 4.0.0 18008 solves this problem.

To do:
Boot from an USB Stick what has an older version of opencore intsalled
Insert this device and turn on your mac
Hold Option / Alt key pressed
select the EFI Icon on the right this should be the USB device
Select your macOS installation - your HDD

After boot uninstall version 4.0.0 18009.1 by using official uninstaller or appcleaner
then install version 4.0.0 18008 and install opencore to your system
Follow the instruction of OCLP T2
After a reboot macOS will boot normally

Discuss this issue on GitHub4 comments