[Prabhjeet]

How can open a mac binary file without using any third party software?
Can i open it directly on mac?

How do i convert a mac file into macbinary file using c++ code? and vice versa

[Jacke]

Strangely enough, I can't think of any way to open a regular Macbinary file without using third-party software. I did some searching around, and it turns out that it isn't even an Apple-developed file format.
Check this link for more info: http://www.lazerware.com/formats/macbinary.html

[Cipher13]

Don't let the name fool you.

"Mac Binary" means little. They're binaries...

The purpose of the format is to have only a data fork, no resource fork, so that they can be perserved on Windows/*NIX servers etc - which tend to destroy the resource fork of files (their filing systems can't handle them).

The files decompress into a multi-fork file.

You can't decompress them without third party utilities, and you don't convert a file to macbinary with raw C++... use a third party app, and if you feel so inclined to write your own, get the libraries/algorithms somewhere...