Hi, I had the same issue months ago and I remember I didn't sleep that night until I fixed it. Try creating the bits directory simply at this location: /usr/local/include/ (usr is in MACINTOSH HD location) The final location of the header should be: /usr/local/include/bits/stdc++.h Also I recommend you MacVim for coding, it's way better than Xcode or Vscode for competitive programming. Xcode just takes a lot of space and for each cpp file it requieres a Project in order to compile, that's not comfortable (Months ago I also used to use Xcode).