Swift Playground and Simulator Error (Ipc/Mig) Server Died, Unable to Boot The iOS Simulator

Swift Playground and Simulator Error (ipc/mig) server died, Unable to boot the iOS Simulator

Your firewall is blocking the debugger, you need to allow it to connect:

TCP out 127.0.0.1:63748

Or allow the debugserver process open access (whichever you, or your firewall, prefer(s)).

Upon enabling it, and restarting Xcode everything should work like a charm.

Note/Update:

If you're having trouble finding, or allowing, the debugserver simply try, temporarily, disabling your firewall and restart xcode. Does the playground work? Oh, and don't forget to make sure you've got the assistant view open and the output box showing.

Xcode 8 won't run my application

It seems the problem was related to a framework that was being embedded in the application via symlink.

I changed one of the build scripts to copy the framework and now everything is working as expected.

Not sure why it worked before, but that seems to be the answer!

Unable to run app in Simulator: Xcode beta 6 iOS 8

I solved it following these steps:

1. Open Xcode 6 beta
2. Go to the menu Xcode > Open Developer Tool > iOS Simulator
3. Even if an error dialog shows up, you still would have access to the iOS Simulator's menu
4. Select Hardware > Device > Manage Devices
5. Click on the little + sign at the bottom
6. Add (if missing) all the devices that you want, or delete and recreate the ones malfunctioning.
7. If anyone of the simulator is not working then right click on it and delete it and then re-create it again

Swift Playground error - FBSOpenApplicationErrorDomain code =4

I tried commenting out most of my code and just having a print("Hello World") line, but that produced the same error as well. So I opened a new playground and copied my code into it. It runs now. Not a very satisfactory solution but at least it allows me to continue working. I assume my playground file had become corrupted.

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