Is it possible to install iOS 6 SDK on Xcode 5

Question

Xcode 5 has a preferences pane that allow one to download iPhone 6 1 simulator  however I can t find a place where it allows downloading of iOS 6 SDK  thus it is not possible to set the active SDK to iOS 6 when developing with Xcode 5  Is there a workaround that would allow Xcode 5 to install iOS 6 SDK   EDIT   Workarounds should no longer be necessary now that Xcode 5 is generally available and allows you to download previous versions of the SDK

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The other answers here are correct too  but I find the following steps to be the easiest   Just download Xcode 4 6 3 from the dev center link that says  Looking for an older version of Xcode    currently points here  and mount the dmg   Then in terminal  copy the SDK files over   cp -R  Volumes Xcode Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs iPhoneOS6 1 sdk  Applications Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs    Finally  relaunch Xcode and you re done

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EDIT  Starting Feb 1  2014  Apple will no longer accept pre-iOS7 apps for submission to App Store  So while this technique still works  it will not be useful for most readers     Yes  this is fine  I still build with iOS 4 3 for one project  it s been awhile since we updated  but they still accepted it after iOS 6 came out   and I currently build 10 5 apps with Xcode 5   See How to point Xcode to an old SDK so it can be used as a  quot Base SDK quot   for details on how to set it up  You can use my fix-xcode  script to link everything for you every time you upgrade   The only trick is getting the old SDKs  If you don t have them  you generally need to download old versions of Xcode  still available on developer apple com   open the installer package  and hunt around to find the SDK you need   SDKs can be found within the installer package at      Xcode app Contents Developer Platforms

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I currently have Xcode 4 6 3 and 5 0 installed  I used the following bash script to link 5 0 to the SDKs in the old version   platforms path   1 Contents Developer Platforms   if   -d  platforms path    then     for platform in  ls  platforms path      do         sudo ln -sf  platforms path  platform Developer SDKs     xcode-select --print-path  Platforms  platform Developer SDKs      done  fi    You just need to supply it with the path to the  app     xcode sh  Applications Xcode-463 app

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Yes  I just solved the problem today    Find the SDK file  like iPhoneOS6 1 sdk  in your or your friend s older Xcode directory  Copy  amp  put it into the Xcode 5 directory    Applications Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs      Then you can choose the SDK like below      Hope this helps you

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Can do this  But not really necessary How to do this Jason Lee got the answer  When installing xCode I preferred keeping previous installations rather than replacing them  So I have these in my installation Folder  So  Applications Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs Contain different sdks   Replace Xcode app with correct number  copy previous sdks to  Applications Xcode 3 app Contents Developer Platforms iPhoneOS platform Developer SDKs Here is my folder after I copied one   Now restart xCode and you can set previous versions of sdks as base sdk  Why it is not necessary Refering Apple Documentaion To use a particular SDK for an Xcode project  make two selections in your project   s build settings   Choose a deployment target  This identifies the earliest OS version on which your software can run   Choose a base SDK Your software can use features available in OS versions up to and including the one corresponding to the base SDK  By default   Xcode sets this to the newest OS supported by Xcode    Rule is Use latest as base SDK and set deployment target to the minimum version app supposed to run For example you can use iOS 7 as base sdk and set iOS 6 as deployment target  Run on iOS 6 simulator to test how it works on iOS 6  Install simulator if not available with list of simulators   Additionaly You can unconditionally use features upto iOS 6  And Conditionally you can support new features of iOS 7 for new updated devices while supporting previous versions  This can be done using Weakly Linked Classes  Weakly Linked Methods  Functions  and Symbols https   developer apple com library ios documentation developertools conceptual cross development Using using html   apple ref doc uid 20002000-SW3 Weak Linking Suppose in Xcode you set the deployment target  minimum required version  to iOS6 and the target SDK  maximum allowed version  to iOS7  During compilation  the compiler would weakly link any interfaces that were introduced in iOS7 while strongly linking earlier interfaces  This would allow your application to continue running on iOS6 but still take advantage of newer features when they are available

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Linking the 6 1 SDK into Xcode 5 as described in the other answers is one step  However this still doesn t solve the problem that running on iOS 7 new UI elements are taken  view controllers are made full-size etc   As described in this answer it is also required to switch the UI into legacy mode on iOS 7     NSUserDefaults standardUserDefaults  setBool YES forKey   UIUseLegacyUI      NSUserDefaults standardUserDefaults  synchronize     Beware  This is an undocumented key and not recommended for App Store builds   Also  in my experience while testing on the device I found that it only works the second time I launch the app even though I m running the code fairly early in the app launch  in   AppDelegate initialize   Also there are subtle differences to a version built using Xcode 4 6  For instance  transparent navigation bars behave differently  causing the view to be full-size    However  since Xcode 4 6 3 crashes on Mavericks  at least for me  see rdar   15318883   this is at least a solution to continue using Xcode 5 for debugging

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I downloaded XCode 4 and took iOS 6 1 SDK from it to the XCode 5 as described in other answers  Then I also installed iOS 6 1 Simulator  it was available in preferences   I also switched Base SDK to iOS 6 1 in project settings   After all these manipulations the project with 6 1 base sdk runs in comp ability mode in iOS 7 Simulator

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I was also running the same problem when I updated to xcode 5 it removed older sdk  But I taken the copy of older SDK from another computer and the same you can download from following link   http   www 4shared com zip NlPgsxz6 iPhoneOS61sdk html  www 4shared com test account test yopmail com test   There are 2 ways to work with   1  Unzip and paste this folder to  Applications Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs  amp  restart the xcode   But this might again removed by Xcode if you update xcode   2  Another way is Unzip and paste where you want and go to  Applications Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs and create a symbolic link here  so that the SDK will remain same even if you update the Xcode   Another change I made  Build Setting   Architectures   standard  not 64  so list all the versions of Deployment Target  No need to download the zip if you only wanted to change the deployment target   Here are some screenshots

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From 1st february Apple will reject app built only for iOS6 or lower  Here is also the official communication from Apple  Better start building for iOS7    To clarify my statement  If you build for iOS6 or lower  apple will reject your app  If you build for iOS7 AND lower everything is fine  this means     you must use xcode5 you should deploy on iOS7 at least    The content of the Apple email is pretty clear at me       Make sure your apps work seamlessly with the innovative technologies   in iOS 7  Starting February 1  new apps and app updates submitted to   the App Store must be built with Xcode 5 and iOS 7 SDK

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Find and download old SDK  Older SDKs are found here   I have copied the xcode app directory as Xcode 4 6 3 app   Now you can test and debug in both xcode versions  You have to run them from the corresponding folders or create shortcuts in your desktop  When building from command line give the parameter as iPhoneOS6 1 instead of iPhoneOS7 0  This worked great for me in Xcode5 and iOS    Go to into Xcode5 s SDK dir  Its usually located at    Applications Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs   Add a symbolic link to the old SDK like this    sudo ln -s  Applications Xcode 4 6 3 app Contents Developer Platforms iPhoneOS platform Developer SDKs iPhoneOS6 1 sdk iPhoneOS6 1 sdk   Or more accurately from anywhere in the command line   sudo ln -s  Applications Xcode 4 6 3 app Contents Developer Platforms iPhoneOS platform Developer SDKs iPhoneOS6 1 sdk   Applications Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs iPhoneOS6 1 sdk

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Just for me the easiest solution    Locate an older SDK like for example  iPhoneOS6 1 sdk  in an older version of xcode for example  If you haven t  you can downlad it from Apple Developer server at this address   https   developer apple com downloads index action name Xcode When you open the xcode dmg you can find it by opening the Xcode app  right click and  show contents   and go to Contents Developer Platforms iPhoneOS platform Developer SDKs iPhoneOS6 1 sdk  Simple Copy the folder iPhoneOS6 X sdk and paste it in your xcode app   right click on your xcode app in Applications folder  Go to Contents Developer Platforms iPhoneOS platform Developer SDKs  Just paste here        Close your xcode app and re-open it again    To test an app in iOS 6 on your simulator   - Just choose iOS 6 0 in your active sheme    To build your app in iOS 6  so the design of your app will be the older design on an iPhone with iOS 7 also   - Choose iOS6 1 in Targets - Base SDK    Just note   When you change the base SDK in your Targets  iOS 7 0 won t be available anymore for building on the simulator

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Just to add  you can actually download old versions of the simulator with Xcode 5 itself - just go to preferences and you ll find them under Downloads

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Download Xcode 4 6 x from the Apple Dev Center  https   developer apple com downloads index action Create a folder called Xcode4 within the Applications folder and drag-n-drop the downloaded dmg there  Open a terminal window   sudo cp -R  Applications Xcode4 Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs iPhoneOS6 1 sdk  Applications Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs   You will be prompt to enter a password since you re inside a system folder Open Xcode 5 and you should now see both SDKs

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You can download the older SDK and install it in   Xcode app Contents Developer Platforms iPhoneOS platform Developer SDKs    folder  Logout   Login just to make sure the changes take effect and you should see the older SDK in your new XCode

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My app was transitioned to Xcode 5 seamlessly because it can still build with the original iOS Deployment Target that you set in the project  5 1 in my case   If the new SDK doesn t cause some insurmountable problem  then why not build using it  Surely there are many improvements under the hood    For example  I will much prefer to use Xcode 5 instead of Xcode 4 6 3  Why  I ll get a lot more battery life because the UI scrolling of text code areas in Xcode 5 no longer chews up an entire CPU thread

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