The extension .xcodeproj refers to the configuration files that belong to the Xcode development environment. The IDE is used for developing apps that run on Apple’s Mac OSX machines or iOS apps. The .xcodeproj is a single container file that stores information regarding the project which helps the developers in saving their work.
However the xcodeproj file itself does not deal with storing the actual source code or data of the application. It stores the workspace configuration pertaining to a particular project that is being developed using the Xcode Development environment. The file itself contains many sub-directories and files.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .XCODEPROJ file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .XCODEPROJ file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .XCODEPROJ file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.