What is the blue section of a partition in Disk Utility? What is the blue section at the top of this image (above Macintosh hard drive partition)? Is it another partition, it only seems to exist on this partition when I create a new one. Where do I find the EFI boot partition?



Thanks :-)
The blue shaded area in the image provided is part of the Macintosh HD volume.

The blue shading denotes the used space on a volume.

The EFI boot system cannot be viewed or modified with any Apple-supplied GUI tool.