With Xcode 3, I'd download it to a network share and update my Macs locally. Now that Xcode 4 comes via the App Store, the standard installation process means that I'd need to download it once for each Mac - that's fine for most apps, but Xcode 4 is over 4GB. That takes several hours and burns through masses of bandwidth, and presumably I'll have to go through the same process every time Apple release updates. Is there a more efficient way to do this? Maybe a download package I can move from one machine onto others? They're all using the same App Store account by the way.