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I don't know why you guys are so worked up about the size of the download file...
Apple has always required full downloads for most program updates. Prior Xcode versions were no different.

With 4+ GB files, a download is not trivial. It takes significant time and bandwidth. And in my case, I usually have to give it a couple of shots, because it often dies halfway through.

But really, this is something that could easily be a patch of a few megabytes in size, so that it's thousands of times larger than that is just dumb.
 
I had the same issue where I wasn't allowed to update but once I got deleted the installer for xcode I was able to. Its a good thing I have a very fast connection for this mammoth file.
 
I don't know why you guys are so worked up about the size of the download file...
Apple has always required full downloads for most program updates. Prior Xcode versions were no different.

I am guessing many of us were hoping that the App Store would fix this =/
 
problems with code completion is still here.
If I use C++ project, completion of 'if/while' is working, with objective-c/C it isn't. Also //TODO: or //FIXME is not working yet
 
XCode 4.01 - unable to update from App Store

I've been having the same problem all day - trying to get XCode to update to 4.01 and having the same problems many here are seeing, that is the:

"To update this application, sign in to the account you used to purchase it.".

I tried everything suggested here and elsewhere but to no avail. Until I started iTunes! Suddenly, when I tried the update it worked. Now, maybe I'm way off the mark, but is something going on where my iTunes account (same as the App Store account of course) has 'unlocked' the update.

mmmm....
 
I am guessing many of us were hoping that the App Store would fix this =/

Exactly! I was hoping the updates would be like the OS updates. Imagine if they required you to download the entire OS every time there was a dot release! I don't mind re-downloading updates for smaller apps, but 4GB is ridiculous...

(especially since I just downloaded the last release a couple weeks ago on my 1.5 MB DSL)
 
Xcode requires you to always re-download the whole program and not a small patch update like other programs
 
Xcode requires you to always re-download the whole program and not a small patch update like other programs

That used to be true, but Xcode 3.2.x on Snow Leopard got incremental updates through Software Update. In fact, I just got Xcode 3.2.6 through Software Update a few days ago. Xcode 4 seems to be a step backward in this regard.
 
Yes, delete the installer from Applications. Go to the "Purchased" tab on App Store and click Install for Xcode.

that's what I did soon after posting.. thank you.

must be a great feeling to have owned a Mac since '84 by the way. I wish I would have existed then.
 
That used to be true, but Xcode 3.2.x on Snow Leopard got incremental updates through Software Update. In fact, I just got Xcode 3.2.6 through Software Update a few days ago. Xcode 4 seems to be a step backward in this regard.
Yes, Xcode 3.2.x is updated via Software Update. Purchases via Mac App Store ( MAS ), including Xcode4 if purchased there, are updated via MAS and not via Software Update. Xcode4 downloaded via the ADC probably will be updated via Software Update at some point in the future. Many developers are in a transitional stage from Xcode3 to Xcode4 and might even have both installed (e.g. /Developer3 and /Developer4 ) in order to be able to compile for PowerPC and use the 10.4 SDK ( yes, there is a long hack with symlinks to bring the SDKs and gcc 4.0 to the drop downs in Xcode4 but I don't like it ). It's still early in Xcode4's life, so Apple probably has its hands full. Clearly, a smaller delta update via Software Update ( or a small downloadable updater ) is desireable. Hopefully, they will get there.
 
Try a download manager, like Speed Download or DownThemAll (DTA Firefox Extension)!

I will wait for Xcode 5 (10 GB to download). :)

That's not really the point though - While downloading an entire program just for something a patch could do isn't AS big a deal on a desktop computer, it is a big deal as iPad apps get more complex and larger and wireless carriers continue to impose ridiculously small monthly bandwidth caps - previous XCode updates (within a single version) normally did not require the upload of the entire program.

Plus the whole idea of having Software Update running automatically while currently needing to remember to run the "App Store" every once in awhile to check for updates is stupid. Even iTunes checks for app updates automatically.
 
I hope I don't speak to soon but I have noticed this version hasn't crashed on me yet where the first version crashed all the time. Anyone else notice this?
 
Yup, that was exactly the error I was getting. After an hour + on the phone with AppleCare, I suggested to them that we should try deleting Install Xcode.app and reinstalling -- that worked. They were claiming never to have seen this bug before -- I guess they don't read MacRumors ;)

I was getting this also. It was because I had renamed the Xcode folder in Applications from "Xcode" to "Xcode 4". Everything worked ok when I changed the name back to just "Xcode".
 
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