Starting from scratch with the Xcode4 MacRuby application template, I had to make a couple changes for Archiving to work: 1. Project -> Build Settings -> Valid Architectures * change to X86_64 only (remove the i386 default) * if you don't make this change, you get the error "ld: warning: ignoring file /Developer/SDKs/MacOSX10.6.sdk/Library/Frameworks//MacRuby.framework/MacRuby, file was built for unsupported file format which is not the architecture being linked (i386)" when archiving or doing a "build for => archiving" with the Deployment scheme. Building with the non-Deployment scheme would still work. 2. Deployment Scheme -> Edit Scheme -> Build * Add the default target to build before the Deployment target. (so you have two targets building under the Deployment scheme) * if you don't make this change, you get the error "Path does not exist `/Users/andre/Library/Developer/Xcode/DerivedData/Tango-duvzaijhkvprmzdhkzkydcudwljf/ArchiveIntermediates/Deployment/BuildProductsPath/Release/Tango.app'" I'm still getting up to speed on Xcode4 schemes and build settings. Are these changes that should be made in the Xcode4 templates? Andre