I haven't been able to download any of my registered Blizzard games onto my new Macbook, I keep getting the 'Unable to authenticate' error message either at the beginning or partway through the download. How can I fix this?

I'm downloading the Mac version, I tried it for StarCraft Anthology, WarCraft 3 ROC, and D2. I'm running OS 10.6.1.

Hi, Whiskey55,

We’ve seen this issue with a few customers, and there are a couple of steps I’d like to try.

First is probably the easiest. Try a different browser.

If that doesn’t work, the DNS cache may need to be flushed. To do this go into the Terminal (Go > Utilities > Terminal) and type in the following:

For Leopard (10.5):
dscacheutil -flushcache
Press Return

For Tiger (10.4) and Panther (10.3):
lookupd -flushcache
Press Return

**Note: Terminal will not tell you if it’s successful, only if there was a problem.

You can also try creating a new admin account:
1. Go to Apple menu => System Preferences => Accounts
2. Create a new Admin account
3. Log into that account
4. Go back into the www.blizzard.com/store and sign in
5. Now go ahead and download downloader
6. Download the installer into the following folder: Mac HD => Users =>Shared
7. Log back into your original Account
8. Run the installer from the shared folder
9. make sure to delete the Account you just created

Finally, please make sure you’re using a wired connection. Apple has acknowledged an issue with the latest AirPort software so a wired connection is going to be far more stable.

It might be. Do me a favor and email me at macsupport@blizzard.com.