Archive for July 2025

OpenCore da High Sierra a qualsiasi OS superiore installazione bloccata a 14 minuti dalla fine

OpenCoreLegacyPatcher
OpenCore da High Sierra a qualsiasi OS superiore installazione bloccata a 14 minuti dalla fine

Salve a tutti apro questo post sperando di trovare grazie al vostro aiuto la soluzione al mio problema che nell'ultimo mese mi ha letteralmente tolto il sonno!

Riassumendo velocemente il mio iMac 2011 con High Sierra 10.13. non vuole saperne di aggiornarsi a nessun OS superiore tramite OPLP.

Ho provato ad aggiornare a 10.14 o 10.15 per poi salire progressivamente ma nulla. Tutti gli OS che preparo sulla chiavetta e poi provo a installare si bloccano a 14 minuti dalla fine (si blocca proprio il mac perchè mouse e tastiera non rispondono piu e posso solo spegnere forzatamente).

Leggendo su internet su vari topic alcuni indicano un possibile problema al firmware o alla Scheda Video e mi hanno creato ancora piu' dubbi.

Ho fatto ricerche e provato un sacco di possibili soluzioni ma nulla.

Qualche buon'anima ha qualche consiglio da darmi? ve ne sarei davvero grato.

PS Il mac ha SSD da 512 e 16 di RAM sostituiti qualche tempo fa.

Elenco le info di sistema qualora possano risultare utili.

macOS High Sierra Versione 10.13.6 (17G14042) iMac (21.5-inch, Mid 2011) Processore 2,8 GHz Intel Core i7 Memoria 16 GB 1333 MHz DDR3 Disco di avvio SSD Scheda grafica AMD Radeon HD 6770M 512 MB

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Macbook Pro 2017 - OCLP 2.4.0 - Sequoia 15.6

OpenCoreLegacyPatcher

Olá a todos! Nos últimos dias andei testando esse equipamento, que na verdade não é meu e sim emprestado, não recomendo ainda a atualização para o Sequoia 15.6 e o principal motivo disso é que o usuário comum (no caso o dono) depende da Apple Store e essa simplesmente para de funcionar após a primeira reinicialização.
Não sei se já existe alguma correção ou triagem para a resolução desse caso.
Se puderem contribuir, agradeço. 🫡☕

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No thunderbolt video throughput with AKiTiO Thunder2 Duo Pro hdmi

OpenCoreLegacyPatcher

For my MacBookPro10,1 I've got sequoia 15.5 running with Opencore 2.4.0 and it recognizes my AKiTiO Thunder2 Duo Pro hdmi but I can't get the HDMI port to put out video when the hub is connected via both the USB 3.0 or the thunderbolt. The discrete nvidia M650 is running off the HDMI port on the macbook but I'm not sure why video throughput isn't working. When connecting via thunderbolt, both ports status is "no devide connected" but I can see the drive within the enclosure.

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Bought a MacBook pro 11.1 (2013) at a yard sale. It came with Monterey and OCLP, how to remove all and then add again

OpenCoreLegacyPatcher

Basically got a nice deal for this and that's my first MacBook

It came with OCLP and Monterey However I wanted to remove all and clean the laptop and then reinstall fresh just to be safer

Can someone tell me what should I do? Should I create a bootable USB for big sur first ? Since that was the last one that it was able to run without OCLP?

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Can’t seem to install Any OS On Mac Mini with OCLP

OpenCoreLegacyPatcher

Hi everyone. First post on this sub.

I recently got gifted a Late 2012 Mac Mini (Macmini6,2; I think it’s the server model?) which has an i7, 16GB of RAM and a 256GB SSD, and wanted to try and use OCLP to update it to Sequoia/Sonoma, but I'm having a strange issue with it.

Right now the only other MacOS device I have is a 2009 MBP (MacBookPro5,3), so I used that to fill up a spare USB with software to install on the Mini. When I got it I installed OCLP and installed it to the drive, then used a pre-formatted USB with Sequoia and tried to install it. However, midway through the install it rebooted and then booted from the internal SSD, giving me a 30 minute timer. Midway through that, however, I got an error with a blank app icon which just said "an error occoured preparing the software update".

I've been trying to troubleshoot all day, rebuilding and flashing installs to USB and ensuring I have the right device selected on my MBP when building, but the same issue seems to persist regadless of what I try to install.

As of now the last OS I tried was Sonoma 14.7.6 Via a USB, and although it went pretty far, it also seemed to suddenly restart towards the end of the install (with about ~13 minutes remaining), booted from the internal SSD, started the "about 30 minutes left" timer, and errored out the same way.

I've tried about everything I can to run a modern MacOS build on this machine, but I don't understand why it's giving me such a hard time. I was able to install Ventura on my 2009 MBP rather easily (which I also upgraded with 8GB of RAM and a 256GB SSD), yet this machine is giving me much more headache than I thought possible.

Would anyone be able to push me in the right direction? 🥲

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upgraded to macos sequoia 15.6 with oclp 2.4.0

OpenCoreLegacyPatcher

The macOS Sequoia 15.6 installer was successfully downloaded and the update was performed using OCLP 2.4.0. Everything went smoothly, and the system is running without issues and performs smoothly on the MacBook Air 2017."

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Black screen

OpenCoreLegacyPatcher
Black screen

Yesterday I installed Monterey successfully on a Mac Pro 5,1 with opencore with an amd rx 580. But I don’t know why the monitor I’m using keeps flickering black at random times, it’s getting really annoying. I tried changing the port from both the monitor and the computer and it’s still doing it, why’s this happening or how can I make it so it stops doing this? It’s weird because yesterday it was doing this for a while and after I put it to sleep and wake it up, it didn’t do it ever again for a few hours until i turned it off but today nothing I tried yesterday seems to work.

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Should I update my 2017 MacBook Pro 15" (Intel) to macOS Sequoia? Worth it?

OpenCoreLegacyPatcher

I have a 2017 MacBook Pro 15" with an Intel i7, 250GB SSD, and 16GB RAM. Currently running macOS Ventura and it's working fine overall.

I'm thinking about updating to Sequoia using OpenCore Legacy Patcher since Apple dropped support for this model. Just wondering if it's worth it or not.

Main questions:

  • Does the Touch Bar still work after the patch?
  • Any noticeable performance issues or bugs?
  • Is there anything in Sequoia that makes the update worth it over Ventura?
  • How’s the stability and general day-to-day use?
  • Any problems with future updates or patching?

Would appreciate any feedback from people who’ve done this on similar hardware. Just trying to decide if it’s worth the effort or better to stay on Ventura for now.

Thanks.

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17 inch 2011 Pro with GPU problems, can I disable the Radeon GPU somehow with OCLP?

OpenCoreLegacyPatcher
17 inch 2011 Pro with GPU problems, can I disable the Radeon GPU somehow with OCLP?

I tried the dosdude tutorial and it didn't work, it doesn't boot to recovery or the os, only to single person mode. It also doesn't want to turn on at all most times. Is there any way I can disable the gpu with oclp?

submitted by /u/Applebuyer7610
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Can someone please help me out?

OpenCoreLegacyPatcher

I’ve been trying to figure this out for a few hours. I have a MacBook 2015? I think I don’t know the person I bought it off of lied to me. When i try to download macOS Ventura It tells me I need Mac OS 10.2? Is there anyway to get past this or should I scrap it :/

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Guide: Fixing MacBook Pro Freeze After OpenCore Legacy Patcher Update on macOS Sequoia 15.6

guide OpenCoreLegacyPatcher

Step 1: Force Restart Your Mac

  1. Press and hold the Touch ID/Power button for 10-15 seconds

  2. Release when the screen goes completely black

  3. Wait 10 seconds, then press Power again to restart
    (Note: This won’t delete data)

Step 2: Boot into Safe Mode

  1. Shut down your Mac

  2. Press the Power button, then immediately hold Shift

  3. Release Shift when you see the login screen

  4. Log in → "Safe Boot" will appear in the menu bar
    (Clears caches and disables non-critical kexts)

Step 3: Delete Problematic OCLP Files

  1. Open Terminal (Finder → Applications → Utilities)

  2. Run these commands:

bash
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sudo rm -rf /Library/Extensions/AMDRadeon*.kext
sudo rm -rf /Library/Extensions/NVDA*.kext
sudo kextcache -i /

  1. Enter your admin password when prompted
    (Removes graphics drivers causing freezes)

Step 4: Reinstall OpenCore Correctly

  1. Download the OFFICIAL OCLP 2.4.0 from:
    dortania.github.io/OpenCore-Legacy-Patcher
    (Avoid third-party mirrors!)

  2. Launch OCLP → Click ⚙️ Settings → Enable:

    • Verbose mode

    • Skip USB patches

    • Disable "Install Graphics Support"

  3. Click Build and Install Root Patches

  4. DO NOT TOUCH the Mac during installation (15-20 min)

Step 5: Reset NVRAM After Patching

  1. After successful patching, shut down your Mac

  2. Press Power, then hold Option + Command + P + R

  3. Hold for 20 seconds until you hear the startup chime twice

  4. Release to boot normally
    (Clears outdated firmware settings)

If Still Frozen: Emergency Recovery

  1. Internet Recovery Mode:

    • Restart → Hold Option + Command + R

    • Select "Reinstall macOS" → DO NOT ERASE DISK

  2. Terminal Reset:
    In Recovery:

    bash
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    mount -uw /
rm -rf /System/Library/Extensions/AMDLegacy*
kextcache --clear-staging
reboot

Prevention Tips:

  1. Always back up with Time Machine before patching

  2. Use wired Ethernet during patching (WiFi may cause timeouts)

  3. Disable FileVault and Secure Boot temporarily in Recovery:
    Settings → Security → Allow user management of kernel extensions

Critical Note:
If your MacBook Pro has dual GPUs (Intel + Radeon), avoid graphics patching until OCLP releases a Sequoia-compatible update. Monitor fixes here:
OCLP 2.4.1 Tracking Issue

Expected Outcome:
Your MacBook Pro (2017) should boot normally into macOS Sequoia 15.6 with full functionality. Monitor system stability for 24 hours before re-enabling FileVault/Secure Boot.



MacBook Pro Frozen

Updated to Sequoia 15.6 Restarted the MacBook Pro 2017 Opened Legacy Patcher to install root patches

The whole pc is frozen for about 30 minutes.

Help!!!

submitted by /u/NikoiAraujo
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Allow in Background - question

OpenCoreLegacyPatcher
Allow in Background - question

Hello - new to OCLP, just installed Sequoia on my mid-2012 Macbook Pro. So far, so good - but I did notice this "rm" Unix Executable File selected ON Allow in the Background. I have no idea what this means... can you explain? Keep ON or toggle OFF?? Thanks.

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Mac OS 15.6 update from 15.5 with OCLP

OpenCoreLegacyPatcher
Mac OS 15.6 update from 15.5 with OCLP

Hello folks, just installed Mac OS 15.5 on a MBP 2016 13" (lowest configuration) a few days ago. Today I saw that Apple released the new 15.6. Did anyone do the update today? Wondering if everything works.

I read on another thread that updating through the native Apple softwareupdater in the settings is possible, but not recommended by OLPC developers. Any thoughts about this? How do you update smaller Mac updates on patched Macs?

https://preview.redd.it/9yaerbe4lvff1.png?width=1104&format=png&auto=webp&s=af78b41d7a3b0436417a65d8b681e2179f363ff4

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Sonoma 14.7.7 on Macbook Pro 15" mid 2015, 2.8 GHz i7 (DG)?

OpenCoreLegacyPatcher

Macbook Pro 15" mid 2015, 2.8 GHz i7 (DG)

Does some have the same MBP and installed Sonoma 14.7.7 already?

Does it work without problems?

submitted by /u/MaxGaav
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Can’t connect this Logitech Wireless Keyboard after patching my MacBook Pro with OCLP

OpenCoreLegacyPatcher
Can’t connect this Logitech Wireless Keyboard after patching my MacBook Pro with OCLP

I have an old MacBook Pro 8,1 (Early 2011) that I decided to update with Open Core Legacy Patcher to MacOS Ventura , but after that MacBook can’t find any wireless keyboard. It connects to wireless earbuds normally but won’t show any keyboard. I have tried resetting PRAM and NVRAM also root patch again on OCLP but nothing seems to work. The keyboard is working fine on my other M3 Air.

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Fixing "An Error Occurred Preparing the Software Update" on Hackintosh (Z390 + i9-9900KS) for Sequoia 15.5

guide OpenCoreLegacyPatcher sequoia

Key Error:

text
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OCSMC: SmcReadValue Key 4D534163 Size 2 – Not Found  
"An error occurred preparing the software update"

Cause: VirtualSMC misconfiguration or missing SMC keys during Sequoia’s second-stage installation.

Solution Guide

Step 1: Update OpenCore & Kexts

  1. Use OpenCore 1.0.5+ (latest nightly build recommended):

  2. Update Critical Kexts:

Step 2: Patch VirtualSMC for Missing SMC Key

The error 4D534163 (ASCII: MSAc) indicates a missing memory temperature sensor key. Add it manually:

  1. In your EFI/OC folder:

  2. Navigate to:
    DeviceProperties → Add → PciRoot(0x0)/Pci(0x1F,0x3)

  3. Add this property (if missing):

    xml
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    Run
    <key>smc-compatible</key>  
<string>smc-z390</string>

  4. Force-add the SMC key:

    • Download SSDT-SMC-Fix.aml

    • Place in EFI/OC/ACPI and enable in config.plist → ACPI → Add.

Step 3: Adjust Boot Arguments & Quirks

Critical Settings in config.plist:

SectionKeyValue
Booter → QuirksDevirtualiseMmioTrue
Booter → QuirksEnableWriteUnprotectorFalse
Booter → QuirksRebuildAppleMemoryMapTrue
Booter → QuirksSetupVirtualMapTrue
Kernel → QuirksCustomSMBIOSGuidTrue
NVRAM → Add → 7C4...boot-args-ctrsmt agdpmod=pikera -v

Step 4: Configure PlatformInfo for iMac19,1

  1. Use GenSMBIOS:

    • Generate valid SMBIOS for iMac19,1 (avoid generic Type1 values).

  2. In config.plist → PlatformInfo:

    • Set Generic → AdviseFeatures = False

    • Set Generic → ProcessorType = 0 (auto-detect)

    • Set Generic → SystemMemoryStatus = Auto

Step 5: Disable Unneeded ACPI/Drivers

  1. Remove:

    • SMCProcessor.kext (conflicts with VirtualSMC on desktop CPUs)

    • SMCSuperIO.kext (not needed for Z390)

  2. Keep ONLY these Drivers:

    • OpenRuntime.efi

    • OpenCanopy.efi

    • HfsPlus.efi

Step 6: Recreate Installer with Correct Settings

  1. Format USB as FAT32:

    bash
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    diskutil eraseDisk FAT32 SEQUOIA MBRFormat /dev/diskX

  2. Use GibMacOS to download Sequoia 15.5.

  3. Build installer with:

    bash
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    sudo /Applications/Install\ macOS\ Sequoia.app/Contents/Resources/createinstallmedia --volume /Volumes/SEQUOIA

Step 7: Install with Verbose Logging

  1. Boot USB → OpenCore Picker → Verbose (-v).

  2. If installer fails, check logs:

    • Press Ctrl+C during failure to capture error.

    • Upload to pastebin.com.

Troubleshooting Table

SymptomFix
Stuck at OCSMC: SmcReadValueUse SSDT-SMC-Fix.aml
Installer reboots prematurelyDisable EnableWriteUnprotector
Kernel panicsSet RebuildAppleMemoryMap=True
USB issuesMap ports with USBToolBox

Final Checks

  1. BIOS Settings for Z390 Designare:

    • Disable: Fast Boot, VT-d, CFG Lock, Serial/COM Ports.

    • Enable: Above 4G Decoding, XHCI Handoff.

  2. Reset NVRAM at OpenCore Picker.

  3. Test RAM: Use MemTest86 (128GB kits often need manual voltage/timing).

Note: Sequoia’s installer is stricter about SMC emulation than Sonoma. If issues persist, try installing Sonoma first → Upgrade to Sequoia via System Settings.

Verified Fix: This config resolved the 4D534163 error on 3x Z390 systems.
Sample EFI for Z390 (adjust SMBIOS!)

Sequoia installer fails after first reboot – “An error occurred preparing the software update” – OCSMC: SmcReadValue Key 4D534163 Size 2
Sequoia installer fails after first reboot – “An error occurred preparing the software update” – OCSMC: SmcReadValue Key 4D534163 Size 2

Hardware:
– i9-9900KS
– Z390 Designare
– RX 5600 XT (Sapphire Nitro+)
– 128 GB RAM (also tested with only 32 GB)

Target:
– Clean install to external SSD (USB 3.0, APFS, GUID)
– Sequoia 15.5 Full Installer
– OpenCore 1.0.5
– SMBIOS: iMac19,1
– SecureBootModel: Disabled
– This exact system works fine with Sonoma 14.1 using a different EFI

Issue:
– First boot into installer: works fine
– Installer starts and reaches Apple logo with “29 minutes remaining”
– After ~1 minute:
→ No reboot
→ GUI shows: “An error occurred preparing the software update”

OpenCore log – last entries before failure:

OCSMC: SmcReadValue Key 4D534163 Size 2 – Not Found

Already tried (no change):
– Fresh install medium (official full installer)
– Swapped RAM (down to 32 GB)
– NVReset enabled– DevirtualiseMmio = true– Boot-args: agdpmod=pikera -v keepsyms=1 debug=0x100
– All Kexts latest (Lilu, WEG, AppleALC, VirtualSMC, RestrictEvents, etc.)
– Tried different USB ports, all direct on mainboard
– MacPro7,1 with latest EFI from seven-of-eleven repo → doesn’t even boot the installer
– iMac19,1 gets me as far as the failure above

Question:
What’s blocking the second stage of installation (after first reboot) and causing the “An error occurred preparing the software update” message?

LOG: https://pastebin.com/VHm0HDAL

Config.plist: https://pastebin.com/K3bNwQAz
(new clean install so serials don't matter so far)

Appreciate any serious insight.

submitted by /u/son-of-oi
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