Mac Developer Library Developer


This manual page is for Mac OS X version 10.9

If you are running a different version of Mac OS X, view the documentation locally:

  • In Terminal, using the man(1) command

Reading manual pages

Manual pages are intended as a quick reference for people who already understand a technology.

  • To learn how the manual is organized or to learn about command syntax, read the manual page for manpages(5).

  • For more information about this technology, look for other documentation in the Apple Developer Library.

  • For general information about writing shell scripts, read Shell Scripting Primer.

BOM(5)                      BSD File Formats Manual                     BOM(5)

     bom -- bill of materials

     The Mac OS X Installer uses a file system "bill of materials" to determine which files to install,
     remove, or upgrade. A bill of materials, bom, contains all the files within a directory, along with
     some information about each file. File information includes: the file's UNIX permissions, its owner and
     group, its size, its time of last modification, and so on.  Also included are a checksum of each file
     and information about hard links.

     The bill of materials for installed packages are found within the package receipts located in

     ditto(1), lsbom(8), mkbom(8)

     Mac OS X's bill of materials format is not compatible with formats from older operating systems.

     The bill of materials file appeared in NeXTSTEP to support installation.  The file format was updated
     and extended for Mac OS X 10.0.  The format was extended to support 64 bit file sizes with OS X 10.3.

Mac OS X                       28 September 2006                      Mac OS X

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