Just wanted to add a bit to this since I came to this thread looking to resolve why my framework builds did not include simulator binaries for both M1 Macs (ARM) and Intel. I was using the same "xcodebuild archive -scheme StructKit -destination "generic/platform=iOS Simulator" ..." command mentioned before, however for me I only ever saw an intel binary in the resigning framework generated. What ended up being the fix, was that inside my .xcproj file some old version of Xcode has left a default "archs" value for simulators that looked like this: VALID_ARCHS[sdk=iphonesimulator] I removed those from two places in the .xcodeproj file, and after that the xcodebuild command produced a framework that had a fat binary with both ARM and Intel.