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I can't run the application on the simulator in the new xCode 9 beta 3 (9M174d). Every time I see the error message: (Mach error -308 - (ipc / mig) server died)

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Mikhail S
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2 Answers2

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Had this issue after installing XCode 9 beta 4. Tried every possible suggestion. The only thing that solved this issue for me was to reinstall Xcode command line tools:

Open terminal and type the command: xcode-select --install

After installation reboot the mac.

ElectroBuddha
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The problem is fixed after installing the latest Mac Os Sierra patches.

Mikhail S
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