What is BOM? What Opens a BOM? File Format List from WhatIs.com

File Extension

BOM File Format

Bill of materials file

BOM is a file extension for a binary file created by the Mac OS X installer. BOM stands for Bill Of Materials. BOM files contain information used to determine which files to install, update, or remove during a software update; contains files that have been installed; may include Unix  permissions, owner and group data, file size, last modified date, and a checksum for each file. BOM files are referred to by the Mac OS X installer, and not intended to be directly opened.


Learn more about .BOM files:

Visit the Apple web page.

Read about Mac OS X at ITKnowledgeExchange.com.

This was last updated in September 2010
Editorial Director Margaret Rouse

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