By default, all software supports multiple file extensions. Apple Keychain Access supports at least 8 different file extensions. The basic files that Apple Keychain Access supports are .P7M. However, not all of the extensions listed on the list are always used to save the effects of work in Apple Keychain Access. Very often, files with such extensions are used as source data files used by Apple Keychain Access.
Apple Keychain Access can be used to convert file formats between the file extensions listed below. You can open a file with one of the file extensions below via Apple Keychain Access and try to save it in another file format, also supported by Apple Keychain Access.