换了新mac后，我也遇到了同样的问题，几个小时后，我尝试了问题中所有建议的答案，但没有一个对我有效。

我的解决方案是安装这个丢失的证书。 http://developer.apple.com/certificationauthority/AppleWWDRCA.cer

在这里找到了答案。 https://stackoverflow.com/a/14495100/976628

在Xcode 8中，“嵌入式内容包含Swift代码”选项不再可用。

它已被重命名为“Always Embed Swift Standard Libraries = YES”

假设项目P正在导入自定义库L，那么必须将L添加进去

P ->构建阶段->嵌入框架-> +。这对我很有用。

我也有同样的问题

有很多答案，但我的答案可能会帮助别人。

// MARK: -核心数据堆栈

 lazy var persistentContainer: NSPersistentContainer = {
            /*
             The persistent container for the application. This implementation
             creates and returns a container, having loaded the store for the
             application to it. This property is optional since there are legitimate
             error conditions that could cause the creation of the store to fail.
            */
            let mom = NSManagedObjectModel.mergedModel(from: [Bundle(for: Self.self)])!
            
            let container = NSPersistentContainer(name: "Test", managedObjectModel: mom)
            container.loadPersistentStores(completionHandler: { (storeDescription, error) in
                if let error = error as NSError? {
                    // Replace this implementation with code to handle the error appropriately.
                    // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
                     
                    /*
                     Typical reasons for an error here include:
                     * The parent directory does not exist, cannot be created, or disallows writing.
                     * The persistent store is not accessible, due to permissions or data protection when the device is locked.
                     * The device is out of space.
                     * The store could not be migrated to the current model version.
                     Check the error message to determine what the actual problem was.
                     */
                    fatalError("Unresolved error \(error), \(error.userInfo)")
                }
            })
            return container
        }()

我同时安装了多个版本的Xcode。这个框架是用更新版本的Xcode构建的。我尝试编译的应用程序使用的是较旧版本的Xcode。当我用相同版本的Xcode清理和编译框架和应用程序时，事情就正常了。

我在运行Swift测试时遇到了这个问题(但不是我的应用程序)。事实证明，测试需要在测试目标的Runpath Search Paths构建设置中有更多的@executable_path/Frameworks。以下设置Runpath搜索路径对我来说很有魅力:

$(inherited)
@executable_path/Frameworks
@loader_path/Frameworks