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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
Added new section to the WIKI page:
macos-iso: Automated macOS ISO Creation for Virtualization
macos-iso provides automated workflows (using GitHub Actions) to create bootable macOS installer ISOs for virtualization and USB use, supporting versions from Lion to Sequoia including Mavericks.
  • Uses GitHub Actions to automate ISO creation—no local script or Homebrew install required.
  • ISOs are built in the cloud and uploaded to GitHub Container Registry (GHCR) for easy download.
  • Supports installer apps from the Mac App Store or Apple.
  • Produces ISOs suitable for USB creation or virtual machines (VMware, Parallels, VirtualBox, QEMU, etc).
  • Supports both Intel and Apple Silicon Macs.
For instructions on triggering a build and downloading the resulting ISO, see the macos-iso GitHub page.
 
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You need at least 2GB of RAM to install Mountain Lion.
I have already tried that suggestion Bigwaff. Once the USB stick is inserted into 2007 with 6 GB memory, iMac a ‘No Entry’ symbol is imposed upon the file.
It seems a download from Mist on a APFS OSX effects the files in some way that makes it incompatible with the old Apple extended format. I am guessing. Whatever - it does not work.
 
I have already tried that suggestion Bigwaff. Once the USB stick is inserted into 2007 with 6 GB memory, iMac a ‘No Entry’ symbol is imposed upon the file.
It seems a download from Mist on a APFS OSX effects the files in some way that makes it incompatible with the old Apple extended format. I am guessing. Whatever - it does not work.
try this image:
Code:
brew install oras
oras pull ghcr.io/startergo/macos-iso:10.8-mountain-lion-dmg
 
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