When trying to install 'graphics tools' from xcode (Xcode -> open developer tool -> More developer tools i get:
{"responseId":"ba7bd79e-487a-49b6-9bf1-f4085dc9e27e","resultCode":1003,"resultString":"request.uri.notfound","userString":"Invalid request, Service mapping to the requested URL is not available. ","creationTimestamp":"2016-07-14T05:58:55Z","userLocale":"en_US","requestUrl":"https://developer.apple.com:443/downloads/index.action?name=for%20Xcode","httpCode":200,"suppressed":[]}
When trying to install from here (downloads): https://developer.apple.com/opengl/
I get:
{"responseId":"76bb89d6-d9a7-4c67-b24e-d65c03e83973","resultCode":1003,"resultString":"request.uri.notfound","userString":"Invalid request, Service mapping to the requested URL is not available. ","creationTimestamp":"2016-07-14T06:00:40Z","userLocale":"en_US","requestUrl":"https://developer.apple.com:443/downloads/index.action?q=graphics","httpCode":200,"suppressed":[]}