I am using Xcode 7 Beta 2 on my Mac. I recently downloaded IOS 8.4 on my iPhone 6. IOS 8.4 was the public release NOT 8.4 Beta. When I plug in my iPhone into my Mac to download it to my phone, but next to my iPhone section it says iPhone (unavailable). The deployment target is IOS 8.4. I suspect that this has something to do with the Xcode 7 Beta 2 not being supported with my newly update IOS 8.4 iPhone 6. And I had update a previous version of my app onto my phone when it was running on IOS 8.3. Could someone confirm my belief or help me solve this problem. Thanks
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You can find ios8.4 sdk from Xcode 6.4,Path: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport,and copy to your Xcode 7.Path:Path: /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

Lau Cherish
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I really don't think modifying the contents of the Xcode bundle is supported behavior... – matt Jul 06 '15 at 15:42
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@grahamcracker1234 :-) – Lau Cherish Jul 06 '15 at 15:46
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@matt emm...I was hesitated for install ios9 on my iphone6 plus, my iPad 3 was working slow on ios8, so I tried to install ios9 for it – Lau Cherish Jul 06 '15 at 15:53
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@matt trust me you can copy all of the files and it works perfectly – grahamcracker1234 Jul 06 '15 at 16:40
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Check the deployment target in xcode project settings deployment info....

Nitesh Agarwal
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Your belief is right. You can't run from Xcode 7 on a device with iOS 8. (You might manage to do it by jiggery-pokery, but the results are unreliable.) You need to install iOS 9 on the device.

matt
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Well I was able to do it with iOS 8.3 on my iPhone 6 before I updated it. – grahamcracker1234 Jul 05 '15 at 17:17
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But if that is the only way, I might as well. But one smaller question. Usually beta versions are buggy. Do u happen to know it iOS 9 beta is glitchy – grahamcracker1234 Jul 05 '15 at 17:18
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Well, let's just say I wouldn't install it on my only device if I were you. :) – matt Jul 05 '15 at 17:25
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"Well I was able to do it with iOS 8.3 on my iPhone 6 before I updated it" Yes, I've heard that. But I've also heard that the results are very odd, as I said in my answer. – matt Jul 05 '15 at 17:25
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Is there a way to uninstall iOS 9. And my app is a iPhone app only. So if I downloaded it to my iPad would it know that it is an iPhone only app or would it just download as an iPad app. – grahamcracker1234 Jul 05 '15 at 17:30
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There is no way to go backwards from iOS 9 as far as I know; Apple's site warns clearly about this. An iPhone app will run on your iPad in "emulation mode". – matt Jul 05 '15 at 17:37