问题
I've read many time that we can install Xcode 4 and keep Xcode 3.
BUT, i've also read that it was not possible with Xcode 4 GM.
Anyone have done this with success?
Update:
Ok, I have installed-it. (different folder)
But it always crash at start. (xcode encounter an internal logic error)
Someone have an idea?
回答1:
It's fairly easy to do. When running the installer, just change "Install location" to something other than /Developer
回答2:
You can install them both fine, simply choose separate directories. I have Xcode 3 installed into its vanilla location (/Developer) whereas Xcode 4 is in '/Developer/XCode4'.
To change the install location: On the 'Installation Type' screen within the installer you'll notice that the 'Developer' folder listed next to the top install item is actually a dropdown - click this then choose 'Other..' to select a custom location.
回答3:
Xcode 4 is still under NDA, but you can always choose to install Xcode 4 in another directory.
来源：https://stackoverflow.com/questions/5009015/install-xcode-4-and-keep-xcode-3