OCLP / createinstallmedia always ends with “Killed: 9” when creating Mojave USB from Apple Silicon Mac

Hi everyone,

I’m posting this because I haven’t found any existing post describing this exact issue, and I’ve already tried a lot of things before writing this post.

I’m trying to create a macOS Mojave (10.14.6) installer USB using OpenCore Legacy Patcher, but the process always fails with Killed: 9, no matter what I do.

I’ll attach a screenshot of the error.

Target Mac (the one I want to install Mojave on)

MacBook Pro 17-inch Mid 2009

CPU: Intel Core 2 Duo

GPU: NVIDIA GeForce 9600M GT and 9400 m

RAM: 8 GB (upgraded)

Storage: 256 GB SATA SSD (upgraded)

Original HDD removed, and there was no macos installation on it because i ve kinda messed up in the past with, ending up installing windows 10 then linux mint on it, with no macos leftovers, but that was years ago.

Machine is fully functional (USB boot, disk detection, etc.)

My goal OS:

macOS Mojave 10.14.6 (tried to install high sierra with high sierra patcher but got an error too will trying to create it)

Host Mac (used to create the installer)

MacBook Pro (Apple Silicon M1)

macOS Tahoe (latest)

USB-C only (using USB-C → USB-A adapter, tested with different adapters and different USB Disks)

What I’m trying to do

Create a bootable Mojave USB installer

Using OpenCore Legacy Patcher (latest version)

Then boot the 2009 MBP via OpenCore and install Mojave

What i ve tried

Firstly, created a bootable OS X El Capitan USB successfully after downloading .app file with Mist

Installer launches correctly on the target Mac

Installation fails with “This copy of the installer cannot be verified”

Tried all known date workarounds from Recovery:Setting system date back to 2016 / 2017 / 2018 Installing completely offline Disabling SIP

Even with the correct date and no network, El Capitan still refuses to install

Then, while using High Sierra Patcher (failed) :

Installer image is restored correctly to the USB key

During the next step (copying System/Installation/Packages), the process fails

Errors encountered:

cp: /Volumes/USB/... No such file or directory

This happens consistently, even after:

Fully erasing the USB (GPT + HFS+) multiple times, with terminal and disk utility

Launching the patcher from /Applications (not from the DMG)

Ejecting all mounted images

Rebooting the host Mac

https://preview.redd.it/6k9ok3mjhqgg1.jpeg?width=3456&format=pjpg&auto=webp&s=cf94000c2774e00d1d5ae89dcb8d98ce0643f253

Finally, with OCLP :

Using gibMacOS to download and build the Mojave installer (.app)

Installer download and creation attempts (chronological)

First, I tried downloading macOS Mojave using Mist on my Apple Silicon Mac.

The Mojave download failed and never completed successfully.

I then tried OpenCore Legacy Patcher (OCLP).

Mojave did not appear in the installer list, even with “Show older versions” enabled.

After that, I used gibMacOS to download macOS Mojave.

gibMacOS successfully downloaded the full macOS Mojave 10.14.6 installer

A valid Install macOS Mojave.app (~6 GB) was created.

I then used this installer with OpenCore Legacy Patcher:

Selected Create macOS Installer

Chose Use existing macOS installer

Selected the Mojave .app

Selected the USB drive

During installer creation, the USB drive is erased and prepared correctly, but when createinstallmedia starts, the process always fails with the same error:

Killed: 9

This error happens consistently, regardless of the installer source, the usb drive, the USB A to USB C, adaptater or the USB C port used.

https://preview.redd.it/nnvk4jztjqgg1.png?width=1264&format=png&auto=webp&s=4dfd98598e983ce9c13b4e792bd361abb58df9c4

At this point, I’m out of ideas. I would really appreciate any input.

Thanks in advance for your help.

submitted by /u/Agitated-Equal-485
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