I uploaded a unity project to Xcode and keep getting a Command PhaseScriptExecution failed with a nonzero exit code error, and the build fails to build. Does anyone know how to fix this?

How do you display the viewcontroller and the main.storyboard side by side to create an IB Outlet.?

I have uploaded an iPad app to the IOS app store for submission, and I would also like to be able to put it on the MacOS app store. I have tested it using the mac simulator and the app is compatible with Macs. How would I upload it to the Mac App Store from Xcode?