Forum Discussion
How Can I Create Bootable USB for Mac OS X Mountain Lion?
I have encountered similar problems before, and I want to install the system on an old Mac. To create a Mountain Lion boot disk on Windows, UltraMDG is a good choice. You just need to download this tool, plug in the Mountain Lion installation package and 8GB USB drive you have prepared, and then use UltraMDG to write the boot disk.
I followed this guide and succeeded!
https://www.howtogeeker.com/make-macos-bootable-usb-on-windows
Compared with other complicated methods, this tool saves a lot of trouble, I recommend you to try it!
Aengusom Creating a bootable USB for OS X Mountain Lion can be challenging today due to several reasons:
Apple’s Legacy Support: Apple has shifted focus to newer versions of macOS, which means that OS X Mountain Lion is no longer officially available for download from the App Store. Finding a legitimate copy can be difficult, as it's considered a legacy OS, and Apple's support for it has diminished over the years.
Compatibility with Modern Hardware: Many modern Mac devices, especially those using Apple’s M1/M2 chips, no longer support older OS versions like Mountain Lion. As a result, the tools and hardware needed to create and use a bootable USB for Mountain Lion may not be compatible with current Mac models.
Because of these reasons, making a bootable OS X Mountain Lion USB today often requires older hardware and workarounds not needed for newer macOS versions.