[SOLVED] Xcode ArgumentError - Malformed version number string ["5.1", "5.0"]

When trying to use the command "pod install" in the terminal on MacOS for a Unity build that uses Facebook SDK, cocoapods, and a few others I got the error "ArgumentError - Malformed version number string ["5.1", "5.0"]"

If someone is stuck with this too, here is how I fixed it: open the project in Xcode, go to Build settings, go to Swift Language Version, change it to Swift 5 (even if it's already on Swift 5) then try pod install again

 

Thanks for sharing the solution @DevDop , much appreciated.

I had this with MoPub library, and if you search for the key "SWIFT_VERSION" in imported SDK's, you ll probably find something like the following;

Code (CSharp):

1. project.AddBuildProperty(target, "SWIFT_VERSION", "5");
2.  

Simply correct it as below by stating the exact version as follows, so you wont need to change Swift Language Version every time you have a new build

Code (CSharp):

1. project.AddBuildProperty(target, "SWIFT_VERSION", "5.0");
2.  

 

TKS

 

This one worked for me, thanks a lot. I ve spent 2 days on this!