‎Xcode 11 on the Mac App Store (apps.apple.com)

Release Notes: https://developer.apple.com/documentation/xcode_release_note...

Major issue that I found: the Mac App Store has a completely broken method for determining “available disk space” and will refuse to download Xcode no matter how much space you free up on your disk.

The only solution I could find was to restart my machine, which seemed to reset whatever mechanism is used for measuring free space.

This has broken docker-sync for me. I get the error:

    mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/include/ruby.h

And nothing I've tried has fixed it.