Apple AppleDouble resource data

What is appledouble file? Understanding and opening appledouble files

appledouble file icon Are you facing difficulties opening appledouble files on your computer, or wondering exactly what appledouble file is?
We've got the best software solutions for opening appledouble files effortlessly.

Apple AppleDouble resource data

An appledouble file extension is related to AppleDouble file system introduced in Apple A/UX system.

Further details

The appledouble file extension is associated with the AppleDouble file format introduced with the first Apple Unix operating system called A/UX.

AppleDouble is similar to AppleSingle file format. However AppleSingle contains resources and data in one single file and AppleDouble in two separate files.

AppleDouble resources part with Finder meta-data has .appledouble file extension and data part is stored in original file format with original file extension. AppleDouble format is better for transport data through Internet, because non-Mac users can open the original file without other decoding like AppleSingle format.

AppleDouble file format is still supported by the Mac OS X. It is used to store Finder meta-data on drives with file systems that don't support resource forks, such as NFS and WebDAV.

Mime types:

Open appledouble file with:

macOS icon


A Unix-based desktop operating system for Apple Mac computers

Mac OS X icon

Mac OS X

Unix-based operating system for Apple Mac computers

What file extension actually is?

Simply put, file extensions are the characters after the dot in the computer file name, so for example document-name.pdf has file extension „pdf“. This helps Windows to identify which program should be used to open the file.

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Our database contains a huge list of different file extensions, usually with detailed description and programs that can be used to open or otherwise work with that particular file type.

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