can't open Garageband: Registry error.

I'm having the exact same problem and it's driving me insane!

Even the geniuses at the Apple Store have no idea what's going on, much less how to fix it. The problem started happening in osx 10.6.8 and it persists through 10.7.x; I have removed and/or reinstalled at least four different versions of Garageband attempting to fix the problem; and I've deleted all kind of files associated with GarageBand, but no dice.

I have the same problem. But it happens when I migrate from Snow Leopard to Lion. I try to delete all GarageBand files, in Library too. And re-install GarageBand'11, but no effect...

I suppouse some plugins was lost when I change OS, but I don't know, how to remove it.

I can tell you that I fixed my problem, but it was far from elegant.

Maybe you can reverse-engineer a solution to your problem through an analysis of the following: I went into my user library and removed all the files that had anything to do with some 6 audio unit plug-ins, all of which had been unsuccessfully "deleted." It took me a while to realize that I no longer had access to my user library and I had to unhide system files in finder.app (which requires a script for terminal.app or a maintenance program like macpilot.app).

The point is this: I deleted everything that even remotely sounded as though it might be associated in some way, however distant, to any of the various six audio-unit plug-ins I've been dicking around with for the past few weeks (especially the component files)...BINGO, fixed it!

[Caution: it would also appear as though I deleted core audio, such that now my MacBook Pro doesn't even have the computing wherewithal to channel sounds through IT'S OWN F*ING SPEAKERS...but I'm confident that I'm just one quick download away from making my computer whole again.]

I removed the Plugins files from Library, but the error message wasn't dissapear.

I solve this problem just now, uninstall plugins by the original Uninstall Script from the CD of Audio Interface 😁

I guess it's because in certain OS X Versions (in my case Lion) there is no Audio Device, which supports Input AND Output at the same time, installed by default. You can check this under Audio-MIDI-Setup in Utilities.

With a Audio Interface connected it works flawlessly!

The same error should appear if you have Logic Pro or Ardour or similar DAW installed.

Hope this clears things up...

Greetings!

REGISTRY in the real sense of the word - APPLE is REAL WORLD-

so register the app - use an APPLE ID and then complete the process

look in the menubar for garageband and click register- it'll will open web page

after that you can fill out information until you get to the point where it asks for a market number- use MB966Z/A- as a single license to your computer- it's that simple

thanks all knowledgeables from the Genius Bar- all they mostly know is how to get hired on to get an ipod

You may not even have to fill out the information- just allow the web page to open

before you know it- Garageband works

ARRRRGH!!!!

I created an account just to post here because this issue was driving me crazy as well. I finally tracked it down (at least my problem).

I had installed some guitar effects processor demos for Amplitube and Guitar Rig. After I uninstalled the demos, that is when I started getting the registry errors. I removed all Garageband related files on the whole drive (sudo find / -iname "garageband") and re-installed from my DVD and still got the registry errors. I registered both my Macbook and iLife '11 with Apple like someone suggested, no dice.

Finally I searched the drive for leftover Amplitube and Guitar Rig files and found stuff leftover all over the place but specifically in both /Library/Audio/Plug-Ins/Components and /Library/Audio/Plug-Ins/VST:

10:17:53 denisesballs@denisesballs-mac:/Library/Application Support$ cd /Library/Audio/Plug-Ins/Components/

AmpliTube 3.component/ Guitar Rig 5.component/

10:19:01 denisesballs@denisesballs-mac:/Library/Audio/Plug-Ins/VST$ ls

AmpliTube 3.vst Guitar Rig 5.vst

I removed those 4 folders and voila! I also removed the other Amplitube and Guitar Rig files from my system, but those appeared to be the ones that fixed the error. Garagband now starts normally without any registry errors. Hope this helps someone.