After upgrading from Ubuntu 12.04 to 14.04, my Nautilus scripts stopped working. The reason: they are polled from a different location in 14.04. In 12.04, they used to be in ~/.gnome2/nautilus-scripts, but now they are in ~/.local/share/nautilus/scripts. I think the link above still has not been updated to reflect the new location.
My 1.5 year old MacbookPro was starting to behave badly including failure to complete booting and other niceties. The computer support guy suggested to upgrade from Mountain Lion to Maverick to see whether it would fix things.
You can make disk dumps from individual partitions or from a hard drive that contains more than one partition. The ladder has the advantage that you can restore the computer by dumping back the image onto the same or another hard drive. But if you want to access an individual partition from a hard drive image, you need to know where the partition boundaries are. You can note them down from the output of fdisk. However, fdisk -l gives the partition boundaries, but the unit is sectors. You need to multiply this number by the logical sector size to get the partition boundaries in bytes.