How to Choose the Best macOS Version for Legacy Shim 2

How to Choose the Best macOS Version for Legacy Shim 2

The best upgrade is not always the newest release; it is the newest release that keeps graphics, Wi-Fi, sleep, battery and daily apps reliable. Unsupported Macs depend on OpenCore Legacy Patcher root patches, and each macOS release changes drivers, security policy and graphics behaviour.

Quick Checks

• Backup current state: Save a copy of your working EFI and run a full system backup before changing settings.
• Identify hardware components: Note down your exact CPU, GPU, Wi-Fi card, and motherboard/laptop model.
• Ensure utility alignment: Keep OpenCore, OCLP, and ProperTree updated.

Fix Steps

1. Create a rollback point: Make a Time Machine backup and keep a copy of your last working EFI folder before editing OpenCore, kexts or root patches.
2. Match macOS to hardware age: 2011-2012 Macs often behave better on Monterey or Ventura; 2013-2017 Macs can usually test Sonoma or Sequoia with an SSD and enough RAM.
3. Avoid risky releases for production: Treat macOS Tahoe or any newly unsupported path as experimental until OCLP support is explicit.
4. Update OCLP first: Install the latest OpenCore Legacy Patcher, build/install OpenCore, then run root patches after macOS boots.
5. Test the real workload: Check browser tabs, Office/Adobe, printing, sleep, Wi-Fi, Bluetooth and battery before calling the upgrade successful.
6. Keep a downgrade path: Have a USB installer for the previous stable macOS before upgrading.

Do Not Continue If

• Do not continue if: you do not have a working EFI backup, a Time Machine backup, or another bootable macOS installer.
• Stop and capture evidence: if the machine stops booting, take a photo of the last verbose line before changing more settings.

Verify It Worked

• The machine boots twice without manual intervention.
• Graphics acceleration and Wi-Fi work after root patches.
• The user apps that motivated the upgrade actually launch.
• Battery and thermals are acceptable for the intended workload.

Rollback

• Restore the previous macOS from Time Machine.
• Reinstall the older stable release with OCLP.
• Keep data on a separate backup before experimenting again.

Next Action

• Test now: reboot twice, reproduce the original problem, and confirm whether the same symptom returns.
• If it still fails: record the Mac model, macOS build, OpenCore or OCLP version, GPU, Wi-Fi/Bluetooth chipset, and the last visible error.
• Read next: use the related searches below for the nearest OpenCore or OCLP fix before making another change.

Related iATKOS Searches

• OpenCore · OCLP · EFI · kexts · config.plist · macOS troubleshooting

Original Question: "Legacy Shim 2"

I’m trying to install monterey on it via oclp, it hangs at kegacy shim 2 submitted by /u/Y0S_H1L0TL25 [link] [comments]

Alternative / Duplicate Questions Resolved:

• "How to Fix Stuck on HID: Legacy shim 2 During macOS Boot or Installation":
  

  How to Fix Stuck on HID: Legacy shim 2 During macOS Boot or Installation

  Boot failures need a predictable pass through firmware, USB, storage, EFI and verbose logs before reinstalling macOS. Most installer stalls come from firmware settings, an invalid config.plist, wrong SSDTs, bad USB mapping or unsupported storage/controller settings.

  Quick Checks

  • Backup current state: Save a copy of your working EFI and run a full system backup before changing settings.
  • Identify hardware components: Note down your exact CPU, GPU, Wi-Fi card, and motherboard/laptop model.
  • Ensure utility alignment: Keep OpenCore, OCLP, and ProperTree updated.

  Fix Steps

  1. Create a rollback point: Make a Time Machine backup and keep a copy of your last working EFI folder before editing OpenCore, kexts or root patches.
  2. Boot verbose: Add -v keepsyms=1 debug=0x100 so the final visible line gives a real clue.
  3. Check firmware settings: Disable Secure Boot and Fast Boot, set SATA to AHCI, disable CFG Lock if possible, and use UEFI mode.
  4. Validate OpenCore: Update OpenCore, Lilu and core kexts, then run ocvalidate or ProperTree clean snapshot.
  5. Recreate the installer: Use a fresh USB installer and try another USB port; older Macs may need a USB 2.0 hub for input during setup.
  6. Reset NVRAM: Reset NVRAM from the OpenCore picker before retrying the installer.

  Do Not Continue If

  • Do not continue if: you do not have a working EFI backup, a Time Machine backup, or another bootable macOS installer.
  • Stop and capture evidence: if the machine stops booting, take a photo of the last verbose line before changing more settings.

  Verify It Worked

  • Verbose boot moves past the previous stopping line.
  • The installer reaches Disk Utility and sees the target disk.
  • Keyboard, mouse and USB remain active during recovery.
  • OpenCore picker still loads after a cold boot.

  Rollback

  • Restore the last booting EFI folder.
  • Use the officially supported macOS installer to recover the machine.
  • Do not erase the internal disk until the installer can boot twice consistently.

  Next Action

  • Test now: reboot twice, reproduce the original problem, and confirm whether the same symptom returns.
  • If it still fails: record the Mac model, macOS build, OpenCore or OCLP version, GPU, Wi-Fi/Bluetooth chipset, and the last visible error.
  • Read next: use the related searches below for the nearest OpenCore or OCLP fix before making another change.

  Related iATKOS Searches

  • OpenCore · OCLP · EFI · kexts · config.plist · macOS troubleshooting
• "How to fix HID legacy shim 2 erorr":
  

  How to fix HID legacy shim 2 erorr

  AMD ryzen 5 5500u 8GB RAM 512GB SSD APU 512MB

  submitted by /u/External-Sir-3965
  [link] [comments]
• "Stuck at "HID: Legacy shim 2"":
  

  Hi, I'm trying to setup Ventura on my Acer Aspire 7 A715-75G-50SA (i5-9300H). I've been stuck at this point for the past few hours. I've tried a bunch of different configs but I just can't get past this. It always hangs around this part. Could anyone please help? So far I've tried prebuilt SSDTs, SSDTTime made ones, different EnableWriteUnprotector settings, toggling DevirtualiseMmio (disabling this causes "vm_shared_region_start_address() failed"), npci=0x2000, replacing USBMap with USBInjectAll.kext, tried removing VoodooI2C, and a bunch of other stuff I forgot. Someone has managed to get BigSur working perfectly on my laptop model; link to their config: https://github.com/AbhaySingh15/Acer-aspire-7-A715-75G-Opencore-EFI My EFI folder: https://files.catbox.moe/skjw7p.zip https://preview.redd.it/e67yujyosw4c1.jpg?width=960&format=pjpg&auto=webp&s=5e93b1b29b4afd6afe47cac7b366be84a960e808 submitted by /u/PantherX14 [link] [comments]

  ---