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 Mountain Lion is a very popular OS X version for legacy Mac computers and I can see many people are looking for a simple way to make bootable USB for Mountain Lion as new Mac does not support this old OS any more.
To create a Mountain Lion bootable USB on Windows PC, the first step is to download the dmg file of Mountain Lion from Apple website. After that, burn the dmg file to USB. This will extract all content from the disk image and make the USB bootable for Mountain Lion installation.
OS X Mountain Lion is the ninth major release of Apple's OS X (now macOS) operating system for Mac computers. Released in July 2012, it introduced various features that bridged the gap between OS X and iOS. It was also notable for increasing security through features like Gatekeeper, which helped prevent malicious apps from being installed by restricting software installation to verified sources.