https://wiki.sarg.dev/index.php?action=history&feed=atom&title=Preferred_Executable_Format 2026-04-17T17:23:09Z Revision history for this page on the wiki MediaWiki 1.44.2 https://wiki.sarg.dev/index.php?title=Preferred_Executable_Format&diff=412206&oldid=prev 2025-06-24T18:08:33Z

<p>Dating maintenance tags: {{How}}</p> <p><b>New page</b></p><div>{{Infobox file format<br /> | name = Preferred Executable Format<br /> | icon = <br /> | extension = <br /> | mime = <br /> | type code = <br /> | uniform type = com.apple.pef-binary<br /> | owner = [[Apple Computer]]<br /> | genre = [[executable]]<br /> | container for = [[PowerPC]] [[executable]] and [[object code]]<br /> | contained by = <br /> | extended from = <br /> | extended to = <br /> | standard = <br /> }}<br /> The &#039;&#039;&#039;Preferred Executable Format&#039;&#039;&#039; is a [[file format]] that specifies the format of [[executable]] files and other [[object code]]. PEF executables are also called [[Code Fragment Manager]] files (CFM).<br /> <br /> PEF was developed by [[Apple Computer]] for use in its [[classic Mac OS]] [[operating system]]. It was optimized for [[Reduced instruction set computer|RISC]] [[central processing unit|processors]].{{how|date=June 2025}} In [[macOS]], the [[Mach-O]] file format is the native [[executable]] format. However, PEF was still supported on [[PowerPC]]-based Macintoshes running Mac OS X and was used by some [[Carbon (computing)|Carbon]] applications ported from earlier versions for classic Mac OS, so that the same binary could be run on classic Mac OS and Mac OS X.<br /> <br /> [[BeOS]] on PowerPC systems also uses PEF, although [[x86]] systems do not.<br /> <br /> ==See also==<br /> * [[Comparison of executable file formats]]<br /> * [[Fat binary]]<br /> <br /> ==External links==<br /> * [https://web.archive.org/web/20020208214155/http://developer.apple.com/techpubs/mac/runtimehtml/RTArch-89.html PEF Structure] - documentation at developer.apple.com via web.archive.org<br /> * [https://developer.apple.com/legacy/library/documentation/mac/pdf/MacOS_RT_Architectures.pdf Mac OS Runtime Architectures For System 7 Through Mac OS 9] - PDF from developer.apple.com (see chapter 8, PEF Structure)<br /> * [https://web.archive.org/web/20110603204602/http://developer.apple.com/tools/mpw-tools/commandref/dumppef.html dumppef Documentation] - description of what is in a PEF file, such as allowed sections the string table.<br /> {{Executables}}<br /> {{Mac-software-stub}}<br /> <br /> [[Category:Executable file formats]]<br /> [[Category:Apple Inc. software]]</div>

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