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Last day I updated to OS X El Capitan(10.11),When I run a project in Xcode (6.3.1), I found the simulator list disappeared.I click the "run" button, Xcode Alert :Xcode cannot run using the selected device.

simulator list disappeared

enter image description here

After that, I selected the simulator as the destination like below and run again, But it don't work and show me: unable to boot the IOS simulator. What's wrong?

simulator as the destination

Cœur
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james
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2 Answers2

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I've seen this happen when resizing the window too narrow. If you widen the window, I suspect the list will re-appear. If not, make sure you file a radar at http://bugreport.apple.com with a screen capture video showing this happening.

Jeremy Huddleston Sequoia
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I suggest you update Xcode to 7.2 and download the iOS7.0