Fixed: The project at ‘/Users/….xcodeproj’ cannot be opened because it is in a future Xcode project file format.

I just found a new issue while trying to open an Xcode project (that is built using a newer version of Xcode) with an older version of Xcode and I got this error: The project at ‘/Users/….xcodeproj’ cannot be opened because it is in a future Xcode project file format. Adjust the project format using a compatible version of Xcode to allow it to be opened by this version of Xcode.

Step 1: To fix it you can simply right-click on the project name on Xcode and open it in finder.

Check the screenshot below:

Step 2: open projectName.codeproj file using any text editor

Check the below screenshot:

Now once you open it, try to find project.pbxproj file and inside that use command + f to find objectVersion. Change the value to around 50 or 60. You can check which value is working for you. It depends upon your Xcode version that you are using right now.

Using this method, we can easily run Xcode 16 project in Xcode 15. Or you can say, we can run Xcode project in backward version compatibility.

You can check the video tutorial made by me from here:

If you have any further issues, do let me know in the comment section below.