Can't seem to add another project as a sub project

Rick Mann

I'm trying to add another Xcode project (a framework I'm building) to my macOS app project. I can drag the .xcodeproj file from the Finder to my app's Files & Groups view, but the resulting entry doesn't have a disclosure triangle, and I can't add any of its targets as a dependency.

Xcode 10.2.1.

Am I missing something obvious?

Rick Mann

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