How to prevent Mountain Lion from going into sleep mode while creating image with disk utility?
Hi,
I have newly and succesfully installed Mountain Lion 10.8.1 on my Mac Pro mid 2010. As usually, as a second back-up option beside Time Machine, I would like to create a disk image of my Mac's hard disk on an external hard drive.
When I boot from the Mountain Lion install USB stick, start Disk Utility and follow the procedure to create a disk image, the process starts, but after 10-15 min the computer goes into sleep mode. I even set the time for going into sleep mode in ML's systems preference to "never", but to no avail, as this was setting was ignored when booting from the USB stick.
How can I prevent the machine from going into sleep mode this and finish creating the disk image? On older OS X versions the same procedure worked flawlessly.
Any suggestions are most welcome!
Thanks for your support,
Greetings from Germany,
Peter
Mac Pro, OS X Mountain Lion (10.8.1)