GarageBand 10.4.13 won't launch after macOS 26.3 update

I can't get GarageBand version 10.4.13 to launch after updating to macOS 26.3. I tried the troubleshooting steps directly from Apple Support, but nothing worked. Does anyone have any ideas?


MacBook Air 13″, macOS 26.3

Posted on Feb 19, 2026 3:20 PM

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GarageBand 10.4.13 won't launch after macOS 26.3 update

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