MEF File: What is it?

Researcher:   |   Revised: December 05, 2018

Microsoft Silver

MEF File Summary

Our most recent information indicates that MEF files are associated with two unique file types (the most prevalent being the Mamiya RAW Image format) and can be viewed primarily with ACD Systems ACDSee, including seven other known software applications (listed below). The MEF File Extension are listed predominantly as Camera Raw Files, while in other circumstances they can be Settings Files.

Windows, Mac, and Web operating systems can be used to view MEF files. Both desktop and mobile devices enable you to view and (sometimes) edit these files, depending on the software used. These files have a Popularity Rating of "Low", meaning they are not very commonly observed on your average hard disk.

If you are having problems opening MEF files, or would simply like to learn more about the software programs and developers that are associated with them, please see the complete information contained below.

Low
Popularity
2970
Rank

/ 11690

Active

State

5

December

2018

Revised

FileViewPro Opens MEF Files

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Kinds of MEF Files

  2 known file types use this extension

Chief MEF Description

.MEF
File Format:.mef
Class:Mamiya RAW Image

Mamiya RAW Image stores the image as it was captured. It is often stored on a memory card, and then transferred to the computer to enable editing and publishing.

Created by: Microsoft Corporation
Function:Camera Raw Files
Folder: HKEY_CLASSES_ROOT\.mef

Other MEF File Associations

.MEF
File Format:.mef
Class:Jaws PDF Server Exported Settings File

MEF file is used by Jaws PDF Server Suite, a program for small office and enterprise. MEF file contains export settings.

Created by: Global Graphics Software Ltd.
Function:Settings Files

Software Programs That Open Jaws PDF Server Exported Settings File Files:


Jaws PDF Server Suite by Global Graphics Software Ltd.

Compatible with:

Windows
Web

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MEF Requests


Operating System Rankings

Windows (82.33%)
Android (11.56%)
iOS (3.43%)
Macintosh (1.71%)
Linux (0.60%)

Browser Rankings

Chrome (58.80%)
Firefox (11.05%)
Internet Explorer (9.04%)
Edge (8.46%)
Safari (3.87%)


Sources of MEF Problems


Typical MEF Opening Challenges

ACD Systems ACDSee Disappeared

You encounter an error message such as "%%os%% Can't Open MEF Files" when trying to open your MEF. If so, it typically means that you don't have ACD Systems ACDSee installed for %%os%%. The typical path of opening your MEF with a double-click won't work because %%os%% cannot make the program connection.


Tip: Another MEF-related program can be selected to open the file by clicking "Show Apps" and finding the application.


Incorrect ACD Systems ACDSee Version

Your Mamiya RAW Image file is incompatible with ACD Systems ACDSee because you might have the wrong version installed. Download the latest ACD Systems ACDSee version from the ACD Systems website to ensure you have the correct one installed. This issue mainly occurs when your Mamiya RAW Image file was created by a newer version of ACD Systems ACDSee than you have on your PC.


Tip: Right-clicking on your MEF, then clicking "Properties" (Windows) or "Get Info" (Mac), can provide clues about your file version.


Primarily, problems experienced when opening MEF files are due to having the incorrect version of ACD Systems ACDSee installed on your computer.


Other MEF File Opening Causes

In the majority of cases, installing the right version of ACD Systems ACDSee will resolve your issue. If you are continuing to have errors with loading MEF files, other external issues might be to blame. Issues that aren't software-related:

  • Windows Registry MEF file paths that are incorrect
  • Corruption of the MEF file description inside the Registry
  • Invalid installation of a MEF-associated program (eg. ACD Systems ACDSee)
  • File corruption affecting your MEF file
  • The MEF is infected with a virus
  • Device drivers for MEF-related hardware are out-of-date
  • Insufficient system resources to successfully open Mamiya RAW Image files

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