Mod:Update readme as the reference build environment is changed.OS X Yosemite and XCode 6.4 CLI tools are proved working now.
Mod:Update readme as the reference build environment is changed.OS X Yosemite and XCode 6.4 CLI tools are proved working now.

SONIC3D/gendev-macos,SONIC3D/gendev-macos,SONIC3D/gendev-macos