| Preferred Executable Format | |
|---|---|
| Uniform Type Identifier (UTI) | com.apple.pef-binary |
| Developed by | Apple Computer |
| Type of format | executable |
| Container for | PowerPCexecutable andobject code |
ThePreferred Executable Format is afile format that specifies the format ofexecutable files and otherobject code. PEF executables are also calledCode Fragment Manager files (CFM).
PEF was developed byApple Computer for use in itsclassic Mac OSoperating system. It was optimized forRISCprocessors.[how?] InmacOS, theMach-O file format is the nativeexecutable format. However, PEF was still supported onPowerPC-based Macintoshes running Mac OS X and was used by someCarbon 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.
BeOS on PowerPC systems also uses PEF, althoughx86 systems do not.
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