How to Resolve Second-Stage Installation Stalls and APFS Write Failures
When installing macOS Tahoe on a Lenovo IdeaPad L340 Gaming laptop (Intel Core i5-9300H Coffee Lake), the system can boot successfully into the installer GUI, but reboot loop or stall after selecting the destination SSD. This behaviour is typically caused by Crucial SSD power management incompatibilities or selecting the incorrect bootloader option during the installation cycle.
1. Prerequisites
- Hardware Specs: Lenovo IdeaPad L340 Gaming, Intel Core i5-9300H, NVIDIA GTX 1650 (must be disabled), 16GB RAM, Crucial 1TB NVMe SSD.
- Required Kexts: Lilu, VirtualSMC, WhateverGreen, AppleALC, RealtekRTL8111, and NVMeFix (critical for Crucial SSDs).
2. Compatibility Snapshot
- Crucial SSDs: Crucial NVMe drives (such as P1, P2, or P3 series) have aggressive link-state power management that causes macOS APFS controller panics during disk writes.
- GTX 1650: The discrete Turing-based NVIDIA card is completely unsupported and must be deactivated.
3. Installation Preparation
- Disable NVMe TRIM temporarily: To prevent write stalls during phase 2, configure OpenCore to bypass TRIM during the installation phase.
4. EFI and config.plist Review
- Inject Boot Arguments: Ensure
-wegnoegpuis added under NVRAM boot-args to disable the GTX 1650 dGPU. - Set TRIM Timeout: Open config.plist. Navigate to
UEFI -> APFS. SetSetApfsTrimTimeoutto0(this disables the TRIM operation on boot, preventing Crucial SSD write panics). - Kext Verification: Confirm that
NVMeFix.kextis enabled in your Kernel kext list.
5. Post-Installation
- Boot Picker Selection: After the installer copies files and reboots, do NOT boot from the USB installer again. In the OpenCore picker, you must select the option named macOS Installer. The system will reboot 2 to 3 times; always select the macOS Installer option until it is replaced by your target SSD name.
6. Troubleshooting
Reported Issue: Stuck in boot loops after drive selection
- Unmapped USB Ports: If the installer loop continues, map your USB ports. Installer write cycles can fail if the target USB port drops offline when the kernel reloads.
- Alternative SSD: If the Crucial drive continues to panic even with TRIM disabled, consider installing macOS on a compatible secondary SATA SSD or a Western Digital NVMe drive.
7. Dual Boot and Advanced Configuration
- Keep Windows and macOS on separate physical drives. The L340 has space for both an NVMe SSD and a 2.5-inch SATA HDD/SSD.
8. Verification, Maintenance and Rollback
- Verify Fix: Ensure the installation progress bar completes and boots to the macOS setup assistant.
9. References and Glossary
- NVMeFix: An open-source kext that improves compatibility and power management for non-Apple NVMe SSDs.
Original Question: "Hackintosh macOS install not working after choosing the external drive"
Hackintosh macOS install not working after choosing the external drive
 | Hi I'm new to hackintosh and I recently tried to install MacOs tahoe 26 have been doing it for the past 6 hours but it still showing me this error no matter what file I add/remove/edit. I tried messing with the kexts file still this error, the ACPI still this error. I tried using a different EFI file from some reddit post I pulled and it didnt show this error in the screen but it keeps randomly booting and when i choose the drive again its gonna run for quite some time and then boots again so I changed back to my original EFI file but to no avail this thing still shows. It would be nice if someone could help me with the process. Laptop Lenovo IdeaPad l340 gaming: I can share my EFI for help request purposes [link] [comments] |
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