Any ideas on how to get around installing that huge iOS SDK in Xcode 4.1?
This Q&A suggests to deselect iOS SDK during installation, but the Xcode 4.1 (App Store-Version) Installer seems to have no "Installation Type" Step anymore.
IOS – Xcode 4.1 installation not customizable? Missing Installation Type Step
iosios-appstorexcode
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Don't accept this answer without vetting it further first, but I think I noticed something during my install.
I think that you don't get any SDKs as part of the XCode 4 install. It was only after I installed XCode 4 and launched it, that the project window showed a download in progress. Clicking it gave me the option of downloading: OSX 10.6 SDK, Legacy OSX SDK, iOS SDK, and something else that I don't remember at the moment. Perhaps extended documentation.
So, the XCode install itself is still very heavy. What with XCode visually, all it's associated applications and libraries, Clang/LLVM/LLDB, profiling tools, and everything.
But, the SDKs themself? I don't think it comes automatically. I can't seem to figure out how to get back to choose the other SDKs to download, so I'm not 100% sure in this.
This is a widely-reported bug in some App Store installers. It sees the iTunesHelper process and displays this error, even though that process is not controlled by the user.
You can open Activity Monitor (in /Applications/Utilities), find the process and kill it with the Quit Process button in the top-left corner.
You can also instead open Terminal (also in /Applications/Utilities), enter the following line and press enter to kill it.
killall iTunesHelper
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Best Answer
You can control or right click to show package contents and run only select portions of Xcode 4.1.
The program Pacifist will let you look into the packages to see what each contains.
The installer has changed to remove the options - it's all or nothing. If space is tight on your boot drive, you will have to either install to another volume and move parts back or temporarily free up enough space to install and clean out what you don't want to keep.