Installing Mavericks over Mountain Lion

Unfortunately I can only confirm that you are not the only one. Same problem here.

I also tried to use internet install from the Cmd+R boot rescue menu, same result

Thank you at reporting this apparent Bug. I will Stay Happy with OS X v10.8.5 on my iMac a l-o-n-g time, maybe ?

Lucky you - didn't work for me 😟

Dang! that was so NOT cool. Same thing happened to me and feel lucky to have found this thread.

I was stuck in a loop of that dialog popping up saying "Unapproved Caller". I tried clicking OK repeatedly and it still kept popping up.

Seeing the comment about Safe Mode, I took the gamble and held the power switch on my 27" iMac until it powered off, waited a moment, then pushed the power button again and as soon as the chime sound happened, held Shift key to boot in Safe Mode and that worked just like it did for @Bart2904.

How in the world would an average user know how to recover from such a situation - it would be bricked computer and a trip to Genius bar. Again, not cool.

Hey, same problem here. Tried the "safe boot" solution, but to no avail. Still stuck with that **** Error message. How can the solution work sometimes and sometimes not?

Apple, help us here!

I've got the same issue and safe boot didn't help.

Who else here disabled gatekeeper (allow unapproved developer applications)?

I did it because I wanted to try to use Docker to chance the color of my Dock but it doesn't support Mavericks yet and who knows what it may have broke.

...was told the same thing

called support and i was unsuccessful in SAFEMODE

Did anyone here get any new solutions? I had not disabled gatekeeper.... so I have no idea why this did happen..

Same s*** for me. it's a disgrace to release something that doesn't work correctly.

Apple has become less and less serious. I'm not as fan as before. They're are getting on my nerves.

Should I turn to Windows again...

A lotta people think the same around me...

I hope they're gonna fix that issue very soon !!!!!!

good luck everyone !

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.

Feedback

Hi everybody,

I'm back to share my solution to fix this issue.

restart your computer.

Press ALT (or option) while it's starting.

you'll be able to chose between your principal HDD,or the RECOVERY HD 10.9 created automatically by Mavericks.

Select it.

...all will work fine after.

Why did we have this issue I don't know.

Maybe because lotta people has been downloading the OS X at the same time and then the authentication didn't work.

good luck !

But I'm sure that works doing that.

Have good day everyone

Hi, tried that already. But you only find the "standard restore" options, like "backup from Time Machine", "run disk utility" and "reinstall a copy of MacOS" - which I did, but found me again with the "unapproved caller"-error.

What exactly happened with your OS when you booted from the "Recovery HD 10.9"? Did it just boot normally to your desktop???

Thanks

i had 3 options. to boot on my "Macintosh HD", "Recovery 10.9", and the "snow leopard cd" i had in my player because I was about to reinstall snow leopard.

I took the gamble to select recovery 10.9 and then it finally finished the installation CORRECTLY.

the only thing i changed, i connected my mac with by ethernet to have more bandwidth because my mac is in my studio far away from my internet box.