You can't run iPhone apps on a Mac computer without an emulator, though that will change with a new set of Macs, coming out by the end of 2020.

In its latest report, Microsoft Threat Intelligence claims to have seen an upgraded XCSSET macOS backdoor being used in “limited attacks”.

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1. Open ios/Runner.xcworkspace in Xcode on macOS 26. 2. Select a real iOS 26 device and press Run in Debug configuration. 3. App launches and immediately crashes at startup. Xcode stops at Thread 1: ...

I am getting this error after I upgraded to Mac OS 26 with XCode 26 in my Bare RN 81.4 project. I had to downgrade to XCode 16.4 to make it work.