File extension .DT
Full Name | Developer | Category |
---|---|---|
Macintosh Format Data Fork | Apple | Data Files |
The DT (Macintosh file data fork) file extension is a classic Macintosh file type used on computers running the macOS prior to 2002. This type of .dt file is created when files are dragged onto the Disk Copy disk image program, which was part of the original Macintosh operating system. The .dt file contains a resource and data fork copying the original Macintosh files, including the application and document data.
This type of file can be opened using Apple File Exchange, which allows users to transfer and open .dt files on Boot Camp-based versions of the macOS. The DT (Macintosh file data fork) file extension is related to other similar file extensions, including .df, .image, dimage, and biimage, which can also be opened with Apple File Exchange.
Uses of the DT File Extension
The DT (Macintosh file data fork) file extension is mainly used to open and transfer PC-based Mac applications to Boot Camp versions of the macOS. DT (data fork) files are often dragged onto DiskCopy disks in order to create ISO images or disk images of PC-based programs, such as various games or software. Additionally, this type of file can also be used to exchange files between Macs and PCs.
Significance of the DT File Extension
The DT (Macintosh file data fork) file extension was an important part of early Mac computer systems. It allowed Macintosh users to copy and drag files onto Disk Copy discs, which could then be used to access and transfer PC-based applications without complicated setup procedures. Without the .dtfile extension, it would have been much more difficult for Macintosh users to open and share large files with PCs due to different formatting requirements.
Programs for MAC system
After installing the required software, the operating system will usually automatically associate an unknown file type (in this case .DT) with the new application. If this does not happen, we can help the system a bit by selecting the software for it, which it should always use to open files with the .DT extension.
When choosing the software we can select the system to use this software every time.
Remember!
Using it for the first time it is good to check whether the .DT file opened in the application can be read by us and opens in a way that allows us to use it. If everything is in order, select this option the next time you open a file with the .DT extension. However, if the file has not opened correctly, we have to look for a different software, with which we can open files with the .DT extension. Select a different software from our list and install it on your computer. After the software is installed, repeat inspection openings of a .DT file. Sometimes you have to repeat the operation several times.
Other instructions
If none of the programs listed by us to work with the .DT file has not meet your expectations, you can try searching other websites. But remember to avoid downloading programs "that can open any file". These applications not only have very limited functionality, but may also expose you to expense tens of dollars when purchasing a license.
In the vast majority of cases you will find the program dedicated to support the .DT file, or any other file format. In addition, there is a chance that it will be a free program, and its functionality (concerning the .DT file) will be extended to the maximum.
It is also good to check
- if the .DT file has no errors
- or if it has been copied (or downloaded by the browser) thoroughly
Author’s guidelines

Mr B. Adam
Author of the guidelines / Founder of FileExtension.info
New technologies enthusiast, helping to solve problems with the files.
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