Files with efi suffix can be typically encountered in installation disc for various operating systems, including Windows, OS X or Linux.

Detailed description

Software that works with efi file extension

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EFI file extension - Extensible Firmware Interface file

What is efi file? How to open efi files?

File type specification:

System file type icon System file type

The efi file extension is used for Extensible Firmware Interface files nowadays used and supported in most operating systems, including Windows, Linux, OS X and other. The latest specification, UEFI, was released in 2007.

The Unified EFI (UEFI) specification (previously known as the EFI specification) defines an interface between an operating system and platform firmware. The interface consists of data tables that contain platform-related information, boot service calls, and runtime service calls that are available to the operating system and its loader. These provide a standard environment for booting an operating system and running pre-boot applications.

The UEFI specification was primarily intended for the next generation of IA architecture-based computers, and is an outgrowth of the "Intel Boot Initiative" (IBI) program that began in 1998. Intel's original version of this specification was publicly named EFI ending with the EFI 1.10 version. In 2005 The Unified EFI Forum was formed as an industry-wide organization to promote adoption and continue the development of the EFI specification. Using the EFI 1.10 specification as the starting point, this industry group released the follow on specifications renamed Unified EFI.

The default software associated to efi file type:

Microsoft Windows icon

Microsoft Corporation logo Microsoft Windows  Microsoft Windows software

Company or developer:
  Microsoft Corporation

Microsoft Windows is a family of operating systems developed by the Microsoft Corp.. The first Windows was released in 1985 as a GUI add-on to MS-DOS.  MS-DOS based Windows versions were developed to 2000, when was released the last version called Windows ME. Windows based on NT core started in 1993. Windows NT family are developed to these days, the latest version is called Windows 10.

Mac OS X icon

Apple, Inc. logo Mac OS X  Apple macOS / Mac OS X software

Company or developer:
  Apple, Inc.

OS X or Mac OS X is Unix-based operating system developed by Apple Inc. for Macintosh computers. It contains basic core applications for everyday use, such as Finder basic file manager, Safari for Internet browsing, QuickTime for video, iTunes for managing audio data and iPod, iOS devices management , iMessage instant messaging, Mail, Contacts, Calendar and many more.

The latest version 10.11 of OS X is called El Capitan. It is available to purchase on Mac App Store as well as is distributed with new Mac computers and notebooks. It includes features to improve the security, performance, design and usability.

OS X operating system was replaced by new macOS in 2016!

Linux operating systems icon

Various Linux developers logo Linux operating systems  Linux/Unix software

Company or developer:
  Various Linux developers

Linux is family of Unix-based operating systems. Linux kernel supports variety of devices such as desktop computers, smart phones, tablet computers, routers, video game consoles etc. Linux is also leading operating system for servers. Linux is available for free in many distributions on the Internet.

Popular distributions for desktops are Ubuntu, Fedora, openSUSE, Debian. For servers are variants of Red Hat, Xandros, Slackware, Debian, SUSE etc.

Operating system for smart phones called Android is also based on Linux. Nokia developed Linux based operating systems for smart phones called MeeGo and Maemo.

Help how to open EFI files:

EFI/UEFI files are accessed by the system during the installation process.

How to convert file with extension EFI:

This file type is not meant to be converted to anything else.

Related links:

EFI on Intel website

UEFI website

List of recommended software applications associated to the .efi file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open efi file, edit efi file, convert efi file, view efi file, play efi file etc. (if exist software for corresponding action in's database).

  • Others efi file

Unspecified and all other actions for computer programs working with efi file - Extensible Firmware Interface file

Click on the software link(s) for more information. Suggested software applications use efi file type for internal purposes and/or also by different way than common edit or open efi file actions.

Microsoft Windows:

Main software associated with efi file by default:
Microsoft Windows small icon Microsoft Windows
Other suggested software:
Microsoft Windows 10 small icon Microsoft Windows 10
Microsoft Windows 8 small icon Microsoft Windows 8
Microsoft Windows 7 small icon Microsoft Windows 7

Apple macOS / Mac OS X:

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ECW file extension > System file types

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file extension EFIRES


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