Notes about the MKEXT file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The MKEXT file type is primarily associated with 'OS X' by Apple Inc.. The Mach kernel is used in Mac OS X. Extensions.mkext is a cache of your current set of KEXTs. It should be located in /System/Library. it's customary to delete Extensions.mkext and reboot whenever you manually change your extensions set. Can be seen in system folders with Windows file sharing.