Actually if you download archive from https://developer.apple.com/download/more/ the same "out-of-space" error appears as if you download from App-Store What actually helps is getting the latest updates for OS-X. Only after this I was able to expand archive or download a new Xcode version.

I have the same issue with my mbp (A1707). My touch bar is off, keys backlight too, problems with authorization of iCloud. I have two assumptions for now according to findings across the internet: it has something to do with the broken channel of power supply of touch bar and T1 chip, maybe some capacitors are dead it has something to do with the T1 firmware update, maybe during os update it was removed, and somehow not replaced What I have tried so far: Restart SCM, Reinstall OS-X from the internet, Run Apple Diagnostics -> all hardware is fine (what?!?) Current workaround: The first-time login in safe-mode (start mbp holding left shift till login), disable wi-fi or switch off ethernet plug, restart mbp in normal mode. Shutdown/Restart always with a disabled internet. I hope somebody from Apple will shed light on this topic and give some explanations on the T1 firmware update and how to recover it or check that it's broken or why Apple (hardware) Diagnostics thinks that's everything fine if my eyes see it is not?? #iDontKnow

What helped me is to use as here suggested: defaults delete com.apple.dt.Xcode IDEPackageOnlyUseVersionsFromResolvedFile defaults delete com.apple.dt.Xcode IDEDisableAutomaticPackageResolution in ci_post_clone.sh script

Check you "Run Script" phases, if you preprocess some frameworks it may influence integrity of the outcome build. T