Dear @Obada,
I believe the issue is related to Command Line Tools 16 or Xcode 16. We’ve encountered a similar problem before, which was resolved by downgrading to CLT 15.3. Not ideal, but this was a workaround.
Could you confirm your Xcode or CLT version using these commands?
pkgutil --pkg-info=com.apple.pkg.CLTools_Executables
xcodebuild -version
Now, the challenge is that MacPorts requires CLT 16 on macOS Sequoia 15.1, and we haven’t found a permanent solution yet. I unsuccessfully tried to install MacPort with CLT15.
We’ll keep you updated as soon as we have more information. Please let us know if you can share any additional observations.
I’m sorry for this inconvenience.
Best, Luigi