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So I was downloading plugins for Garageband. They were Audio Units, so they work with Garageband, and I was also able to drag and drop my Component files into the Components folder, my usual process of being able to use plugins on Garageband. You know going to Macintosh HD> Library> Audio> Plug-Ins> Components. I've done this process lots of times. It works. But when I tried to use the new Plugins--Which I will say, do show up in Garageband--it says “Plugin Name.component” cannot be opened because the developer cannot be verified.". When I click Cancel it says "Audio Unit plug-in can’t be used" and then just does nothing.

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This has been happening with all the new plug-ins I've been adding, I haven't been able to use one. I've tried restarting multiple times and it still says the same thing.

How can I fix this?

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  • Best guess: you'll need to go into the System Preferences and give explicit permission for those files to be opened. I'm not sure which SE site is the right one for finding the explicit instructions, so I've flagged your question for the moderators.
    – Aaron
    Apr 7, 2021 at 0:04
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    I’m voting to close this question because this is not directly related to the musical functions of music software; rather it's a software or system problem better addressed on an appropriate SE site.
    – Aaron
    Apr 7, 2021 at 0:05
  • Can you go into settings -> security -> general and check if there is something on the lower right hand corner, like an "allow xyz button" or something similar? Try this when this error message appears
    – X_841
    Apr 7, 2021 at 7:38
  • Which version of macOS are you running, where do you download the plugins from?
    – nohillside
    Apr 7, 2021 at 8:24

1 Answer 1

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You could try removing the quarantine attribute, which likely causing the problem. See the answer here for details:

"Install Spotify" can't be opened because Apple cannot check it for malicious software

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