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I don't remember what my previous Xcode Version is, maybe 6.3.2 or 6.4. When I upgrade to Developer Preview Mac OS El Capitan Version, I could not use Xcode.

Cœur
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水清木华
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2 Answers2

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So I download the Xcode 7 beta 3 (https://developer.apple.com/xcode/downloads/)

Then I installed it, however, My IPhone is iOS 8.4, And it just says unavailable. I follow the instruction and open Windows->Device, It says

"couldn't find the developer disk image"

it doesn't contains the IPhoneOS platform. So I want to install Xcode 6.4, cause it contains iOS 8.4 image, But it says

"Application Xcode can't be used with this OS X version"

I want to combine Xcode 6.4 and Xcode 7 together, So I find a solution: https://forums.developer.apple.com/thread/7698

if you download Xcode 6.4 posted yesterday, then copy Contents>Developer>Platforms>iPhoneOS.platform>DeviceSupport>8.4 (12H141) to the Xcode 7 beta, it seems to work fine. Yes, IPhone Connected.

Finally, I combine El Capitan, iOS 8.4, Xcode 7 and worked well.

Cœur
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水清木华
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You can launch old xcode versions (6.1, 6.4) on El Capitan:

/Applications/Xcode6.4.app/Contents/MacOS/Xcode </dev/null &>/dev/null &

You can change Xcode6.4 as per your name of xcode file in application.

hichris123
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Krunal
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