When I tried to run a tool that relies on Xcode, the Mac gave this xcrun error: xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun.

Most of the time, my Mac simply reported failure: Unable to Install Update. Once it reported it could not download Xcode: Unable to Download App. The App Store kept trying to update Xcode each night through automatic updates. With the Catalina upgrade, my Xcode did not automatically update to 11.1. While these issues will mostly affect developers, the fixes might help others as well.

Many developer tools on Macs rely on Xcode behind the scenes. If you use Xcode, I recommend fixing Xcode first. Errors and problemsĪfter upgrading to Catalina, I’ve run into three types of issues: Xcode, Homebrew, and Ruby/Gems-related. Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/…/include/c++/v1/ctype.Setting up your Mac for development for the first time? See my article Zero to Hero: Set Up Your Mac for Software Development. opt/local/include/unctrl.h:61:61: error: expected ‘ ’ after top level declarator NCURSES_EXPORT(NCURSES_CONST char ) NCURSES_SP_NAME(unctrl) (SCREEN, chtype) opt/local/include/unctrl.h:61:38: error: cannot initialize a variable of type ‘char *’ with an lvalue of type ‘char *(chtype)’ (aka ‘char *(unsigned int)’) In file included from /Applications/Xcode.app/Contents/Developer/Platforms/atform/Developer/SDKs/MacOSX.sdk/usr/include/ncurses.h:141: While building module ‘Darwin’ imported from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/…/include/c++/v1/ctype.h:38: While building module ‘std’ imported from input_line_1:1: I basically did already what you showed, but still without successful compilation: I am not sure what the difference in your and my environment is, I had to change to python 2.7, as I was getting a warning that a python 3 will produce problems at later stage.

Unable to install app xcode