Download [2021] Os X Mountain Lion Bootable Usb -

Find in your Applications folder. Right-click it and select Show Package Contents . Go to Contents > SharedSupport and locate InstallESD.dmg . Double-click InstallESD.dmg to mount it on your desktop. In Disk Utility , click the Restore tab.

Disclaimer: This article is for educational and archival purposes. OS X Mountain Lion is no longer supported by Apple and should not be used as a primary OS for internet banking or sensitive data due to unpatched security vulnerabilities. download os x mountain lion bootable usb

This is a classic Mountain Lion bug related to firmware verification. Solution: Be patient. Wait 15 minutes. If still frozen, force restart. The install usually completes successfully on reboot. Find in your Applications folder