The various items present in the different volumes present on the Mac system, is identified by the catalog record. The contents present in a directory are obtained by exploring the catalog B-tree that is present on each Mac system. A large amount of redundancy is maintained in the data structures, to improve crash recovery abilities of the system. The Finder option also makes use of several catalog records, which have been specifically reserved for them.

In Mac, each file or folder is represented with respect to their parent directories, though each file has its own unique identification number. This is made use of widely when searching for a file using the Finder option in a Catalog B-Tree. These factors make the Catalog record a very essential part of every Mac computer. Sometimes however, these Catalog records get corrupted due to various reasons like virus attacks, system file corruption etc. This will make the files inaccessible, hence leading to data loss. But there is nothing to worry, as recover Mac software can rectify this problem, and undelete all your lost data.

Mac Recovery software lets you recover deleted / lost files from both HFS+ and HFSX volumes. This professional Mac data recovery software freeware demo comes with an in-built Preview option, which lets you preview the recovered files, before saving them.

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