Mountain Lion stops downloading at 41.3 mb's. Shows calculating and does not move on!

I am having difficulties too!. I have found a way to push it along but don't know if in the end this will eventually succeed and I don't know why I am having to do this.

For what it is worth.

But going to the app LaunchPad and clicking on the in progress OS X Mountain Lion download and pausing it momentarily and then clicking it again, I have gotten my download to keep moving along. Again I don't know why and I have had to do this several time to get the download to progress to 3.11GB out of the total 4.37GB. So I'm three quarter of the way thru and about to do the process again to get the apparently stalled download going again.....

OK. It is again moving along..... now to 3.27GB

Too me it has the symptoms of the download process finding it has a bad package and repeatly trying again until it stops trying. At that point is just stops. When one kicks it by doing the LaunchPad stop and go, I think it checks finds a problem and restarts the download of the problem packets .... that's my theory....

My download is now up to 3.79 out of 4.27GB.

I have been messing with this on three computers in my network for a couple weeks..... This is the furthest I have gotten..... Perhaps I will succeed today....

BTW - It appears to have stop again at 3.79.... I;m going to play the stop/go game in Launchpad....

After about aminute it has started downloading again.....

Now 3.80GB.....

Perhaps Apple should look more carefully at it's caching servers...... I think they are either timing out connections or somehow making the past never fail Apple Downloaded look pretty advanced compared to this stop and go model....

I am now up to 4.03 and downloading with about 10 minutes to go....

Message was edited by: Terry Fundak

I have finally gotten success with the LaunchPad - Pause/Download work around...

Can't tell you why it works ..... nor does it work fast..... but finally... it worked.

This has worked for some people:

App store download problems: - Sign out of the App Store (in the Store menu)

- Quit the App Store

- In Finder - Go>Go to folder... (or Apple-shift-G)

- Paste in the following "~/Library/Caches/com.apple.appstore"

- It will take you to a folder. Delete the whole folder and empty the trash.

- Launch the App Store. Sign in and then reclick the Mountain Lion buy. It won't charge you again.

I like this answer and did try this earlier in my quest..... it didn't work. but my note about LaunchPad - Pause/Download while painful and inefficent did work..... I've now got two machines upgraded....

Thanx Eric for the post....

You are welcome.