i got message "OS X Yosemite failed to download" "Use the Purchases page to try again."

I had the same issue but it bas been solved once i replaced the DNS with 8.8.8.8

I had the same problem to download on my second mac, the first one sail smoothly.. is this because of traffic?

The possible solutions are;

1. change your DNS through your network settings
2. change your internet connection
3. use VPN (abelq mentioned in the previous posts)

If DNS change doesn't work, it means your internet provider is not allowing you to download more than 860MB at once. For instance, your phone's hot spot can limit the max file size for download. As a better solution try to use another internet connection if you have any. If you don't have an alternative connection, use a free or trial VPN service for this download. Therefore, you ISP never gets whether you downloading a file which is large in size.

Good Luck.

Just got back to check if the Yosemite download was a success. Indeed, downloading via VPN was what worked for me. I haven't just installed it yet as I'm yet to find all the prep to do a fresh install.

Cheers!

Today, again, Yosemite took all day to load, then failed at the very end of loading. I'm calling it quits on this update for a long time, will see if bugs get worked out. I have a 2009 iMac, Mavericks works like a charm.

I just tried this (changing DNS address). Same error message. Doesn't seem to work. Guess I don't need Yosemite anyway

I've decided to wait a month or two. It failed several times on me, after taking several hours to load each time. I'll just see if time heals!

I am expressing the same issue from Dubai. just wait couple hours or days when the server is less busy, it works...

good luck..

Same problem. Wonder if Apple listening?

Was Facing the Same problem

This worked for me

I am also unable to download Yosemite.

Was able to download.. I think it is a server traffic issue over at Apple. Hope you guys are able to download now

I am using a MacBook PRO, 15-inch early 2011, 16 Gbyte RAM, Current OS X is 10.9, 299G free disc space. According to Apple this should not be a problem.

I have...

turned off my virus protection

turned off firewall

rebooted - no help

tried a different ISP in another part of the country - no help

As many times as I have tried to download I do not buy the line that traffic to Apple's servers is a problem.

the problem is with h DNS settings

This worked for me

This worked for me! thanks.