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Question: Error: iOS needs to repair your library before open applications

Hi all,

I have just downloaded and installed the latest version of Garage Band in my MacBook Pro (recently updated to the last iOS High Sierra). When I try to open the app, a message pops up telling 'iOS needs to repair your library before open applications'. I click the 'repair' button; however, it seems nothing changes since Garage Band is not able to start and it quits suddenly.

Just wondering if anyone is experiencing the same issue, and possible ways to solve it. Thank you 🙂

MacBook Pro with Retina display, macOS High Sierra (10.13.1)

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In similar cases it helped to disable iCloud for GarageBand. Can you launch GarageBand, if you disable iCloud in the Settings > Your Name > iCloud > GarageBand? You will no longer be able to access the Projects in iCloud, however.

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Dec 13, 2017 12:00 PM in response to Giammo In response to Giammo

This might be a system wide problem with your Mac and not a GarageBand problem.

Do you have enough free storage on your Mac? GarageBand may not be able to download and install the sounds and loops.

What does the crash log show, when you click the Report button?

User uploaded file

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Dec 13, 2017 6:36 AM in response to Giammo In response to Giammo

In similar cases it helped to disable iCloud for GarageBand. Can you launch GarageBand, if you disable iCloud in the Settings > Your Name > iCloud > GarageBand? You will no longer be able to access the Projects in iCloud, however.

Dec 13, 2017 6:36 AM

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Dec 13, 2017 8:05 AM in response to Giammo In response to Giammo

Sorry, I have been confused, because you called the system iOS in your original post and I kept thinking of GarageBand iOS on my iPhone and iPad..


On your Mac try to launch GarageBand by double-clicking one of your projects. Do not click the project you have most recently been working on, but a different project. Can GarageBand open an older project?


If you cannot open GarageBand by double-clicking a different project, try to hold down the options key ⌥ while double-clicking GarageBand. Does that work?

Dec 13, 2017 8:05 AM

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Dec 13, 2017 8:34 AM in response to léonie In response to léonie

You right Léonie, I wrote iOS instead of macOS, sorry for this, and thank you again for your tips.

I downloaded the Garage Band app for the first time in my mac couple of hours ago, I have no project yet, and I reset my iphone/ipad app (nothing relevant in there). I tried to double click holding down ⌥, (in folder -> application -> garage band -> double click + ⌥) but the result is the same: as soon as I click the message 'macOS needs to repair your Library to run applications', i then click 'repair' and another message ('GarageBand quit unexpectedly') pops up, making impossible to reopen the app...

Dec 13, 2017 8:34 AM

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Dec 13, 2017 9:46 AM in response to Giammo In response to Giammo

I downloaded the Garage Band app for the first time in my mac couple of hours ago

Did you install GarageBandfrom the Mac App Store , or where did you get it from? The current version is GarageBand 10.2, and it is running well on my Mac.


a message pops up telling 'iOS needs to repair your library before open applications'. I click the 'repair' button;

Could you please post a screenshot of this message?

Dec 13, 2017 9:46 AM

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Dec 13, 2017 12:00 PM in response to Giammo In response to Giammo

This might be a system wide problem with your Mac and not a GarageBand problem.

Do you have enough free storage on your Mac? GarageBand may not be able to download and install the sounds and loops.

What does the crash log show, when you click the Report button?

User uploaded file

Dec 13, 2017 12:00 PM

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Question: Error: iOS needs to repair your library before open applications