Reply to Xcode 12 Beta 5 arm 64 issue as building for iOS Simulator, but linking in dylib built for iOS The appropriate "slice" would be a version of "XXXFrameworkName" that is ARM64 and compiled for the iOS Simulator. You have ARM64, but compiled for the iOS Platform. I'd imagine that you will have 2 ARM64 binaries in one static library. Developer Tools & Services Xcode Oct ’20