I plan to export the product to GitHub, giving it to people there.

Do you have any examples of how you get Objectitive c on swift? Thanks for your help!

I did every thing but when I put + (void)test { NSLog(@"Hello Cruel World!"); } in it, it had this error missing context for method declaration

I did all that, and it worked, but after I put AuthorizationExecuteWithPrivileges xcode gave this error: 'AuthorizationExecuteWithPrivileges' is deprecated: first deprecated in macOS 10.7, and this Expression result unused. Any way to fix this? Thanks for your help.

I've had the same thing, its really annoying. Since most people are having this "Glitch" its most likely update realated. So when apple releases the next update, make sure to update.