View Full Version : ML clean install from USB stick not working

Feb 19, 2012, 09:06 AM

I'm trying to clean install Mountain Lion the same way I did with Lion (extracting InstallESD.dmg, putting it on a USB stick).
Unfortunatley my iMac 27" 2010 won't boot it. It stays looping the little progress wheel.

Anyone got a solution for this?

Feb 19, 2012, 09:09 AM
Is the USB flash memory thumb drive properly formatted?
How to format a new HDD/SSD to install Mac OS X or make a bootable copy onto (http://forums.macrumors.com/showpost.php?p=12483448&postcount=22)

Did you take similar steps like shown in this guide?
Make An OS X Lion Boot Disc (http://www.macrumors.com/2011/07/18/make-an-os-x-lion-boot-disc/)

Feb 19, 2012, 10:14 AM
Did the same thing again and now it works. However, thanks!