If you’re still using a Mac OS X the time will come when your computer won’t boot, or a problem may arise where you can’t take control of the device, and booting from an OS X installation media will be required.This is why it’s recommended that you make a Mac OS X bootable USB when your Mac is in working conditions. However, if you find yourself on a scenario where your device (iMac, MacBook Pro, Air, Mac Pro or Mini) is not responding and you happen to have a Windows device, then you can still be able to make a USB bootable installation media for your Mac OS X to reinstall the operating system using the Recovery Assistant.These instructions will also work for Windows users, who are running Mac OS X on a virtual machine and need to upgrade to the latest version. For instance, to OS X Yosemite.

Jesus Vigo goes over the steps to create a bootable USB to install OS X 10.7-10.8 and OS X 10.5-10.6, as well as how to put multiple versions on the same USB. We get it, you have looked everywhere for the Apple Mac OS X Mountain Lion Download 10.8, but all you are getting is links to the app store.Well we have exactly what you need. We have the Mac OS X 10.8 Mountain Lion Download here and its free and fast. No signup, no slow download unless you pay, just straight up files.

Things to know before proceedingBefore you dive into this guide, you’ll need a few things:. A broken Mac computer with Mac OS X. A trial copy of the TransMac software. One high quality USB flash drive with 16GB of storage. A copy of Apple’s macOS (DMG file).Now that you have all the necessary ingredients, you’re ready to make a Mac OS X bootable USB using the DMG file of the operating system with the steps below. How to create Mac OS X bootable USB installation mediaBefore you can use TransMac, you may first need to partition your USB flash drive with a GPT partition, as a normal MBR partition may not work.

To do this, you’ll need to use the Diskpart command-line utility on Windows. Setting up GPT partitionUse these steps to set up a USB drive with a GPT partition:.Open Start on Windows 10.Search for Command Prompt, right-click the top result and select the Run as Administrator option.Type the following command to open Diskpart and press Enter: diskpart.

Quick note: TransMac is a paid software, but it has a 15-day trial solution, that give us more than enough time to move the DMG files to the USB drive from Windows. (If you want to support the developer, you can purchase the full version.).Insert the USB drive that you’ll use to fix your installation of OS X. (Remember that all the data in the USB will be erased. Make sure you take off any important documents.).Right-click the TransMac software icon and Run as administrator. (You’ll be prompted to Enter Key or Run, because we’ll be using it once, click the Run option.).On the left pane, you’ll see all the Windows PC drives listed, right-click the USB drive that you’re intending to use to reinstall Apple’s OS X and select the Restore with Disk Image option.In the warning dialog box, click the Yes button.Use the Restore Disk Image to Drive dialog box to browse for the DMG file with the installation files for Mac OS X Yosemite in this case, and click the OK button to create a bootable USB of the operating system.Now, you’ll have to wait a long time. It could take one or two hours to complete the process depending on your computer and other variables.Once your bootable USB installation media is ready, remove it and insert it into your Mac, power it on, holding down the Option key, and select the USB you just created to reinstall Mac OS X.