05-18-2015, 11:14 PM
I've just tested Xcode 6 (6.3.1 to be exact) on a clean installation of Yosemite and everything seems to be working! To compile for all versions of Illustrator you will need Xcode to be fully modified with files from versions 3, 4, and 5. That is, you will need to download Xcode 3.2.6, 4.6.3, and 5.1.1, put them in the same folder as the newest XcodeLegacy.sh script. Once you run the script with the 'buildpackages' argument, it will extract everything it needs from the various downloads. Once run with the 'install' argument, it will copy everything needed from all those extracted files to the clean Xcode 6.3.1 app (thereby enabling legacy support). Finally, once run with the 'cleanpackages' argument, it will delete all the files it temporarily extracted from the downloads.