What is .BOM file extension?
"Bill of Materials" (BOM) file created by the Mac OS X Installer; used to determine which files to install, update, or remove during a software update; contains files that have been installed and information about each file; may include Unix permissions, owner and group data, file size, last modified date, and a checksum for each file.
When BOM files are created, they are saved by default in the /Library/Receipts/boms folder. These files are referenced by the Mac OS X Installer and are not meant to be opened by the user.
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.