XCODEPROJ files support Mac OS software. The Apple Xcode software supports these Developer Files. On Apple’s website find information about Xcode and supported files.
To create an XCODEPROJ file use Xcode. Select File, New, then Project. Finish developing software by choosing Product, Build to compile source code. This builds an executable APP file.
Open XCODEPROJ files with Xcode in macOS. These files link source code, documents, resources. They also store targets, results, bookmarks.
XCODEPROJ files are Developer Files. Mac, iOS and OS X El Capitan systems support this file type. These files are on both desktops and mobiles.
To learn more about XCODEPROJ files see below. XCODEPROJ files associate with certain software.
Double click the XCODEPROJ file. Manually select the program installed to open the file if needed. The file should open without issues.