What is HFS+ ?

This is the principal file program of Mac OS X. It is a journalled, comparatively modern day file program that supports POSIX permissions, and attributes at least restricted automatic defragmenting of files. Mac OS X is capable of mounting these volumes for reading and writing, and has complete capabilities to use them. Mac OS X systems can also only boot from hard disks formatted in this method (as well as bootable optical media). Windows has no native help for this format, but third party tools such as MacDrive enable for restricted study/create support on Windows systems.
Mac OS Extended format (HFS+) is a hard disk format introduced on January 19, 1998, by Apple Inc. to replace their HFS and the principal file method in Macintosh computer systems and iPod music players.
Up from HFS, HFS+ increases the number of allocation blocks on the disk and decreases the minimum size of a file, therefore optimizing the storage capacity of a large difficult disk.
HFS Plus or HFS+ is a file method created by Apple Inc. It serves as the major file system of OS X. HFS+ was developed to replace the Hierarchical File System (HFS) as the principal file system used in Macintosh computers (or other systems operating Mac OS). It is also a single of the formats employed by the iPod digital music player. HFS Plus is also referred to as Mac OS Extended (or, erroneously, “HFS Extended”), exactly where its predecessor, HFS, is also referred to as Mac OS Normal (or, erroneously, as “HFS Standard”). During improvement, Apple referred to this file program with the codename Sequoia.