The scheme 'PrintingWebView' contains no buildables that can be built for the SDKs supported by the run destination My Mac 64-bit. Make sure your targets all specify SDKs that are supported by this version of Xcode.
You can access Target Membership by selecting file and opening the right menu in Xcode (the menu is called Inspectors ). Then, in File Inspector at the bottom of the menu, find Target Membership . It's very important to check all files in your project because without this you won't be able to build a new app target.
You can also add new apps, system extensions, test suites, and other types of targets to your project. To add a new target: Choose File > New > Target. Select the platform for the new target.
The central component of the iOS SDK is Xcode, Apple's interactive development environment (IDE). Xcode facilitates building apps for OS X, iOS and WatchOS. Xcode includes the interface, the LLVM compiler, instruments and iOS simulator tools that make development and testing possible without an Apple device.
I've met with this problem. In my case, the following steps can solve it:
your project -> target -> Build Setting
Modify following items: 1.Base SDK ; 2.Architectures ; 3.iOS Deployment Target.
And then clean and build the application.
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