Logic Pro X stopped working today

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Ace2008 Author

Level 1

10 points

Logic Pro X stopped working today

What happened to Logic Pro???? Yesterday It worked perfectly. Today it freezes and never starts.

I followed the instructions from Apple, but it still will not work.

I've re-installed it and it still won't work

I've used a different user and in that one it says that I have used over 99 audio tracks, when I haven't used any

The problems appear to start with the scanning of audio units.

If I disable core audio, it loads but nothing works.

What happened overnight to cause this?

iMac 27″, macOS 10.15

Posted on Jun 14, 2020 1:58 AM

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Answer 1

Iaamusic

Level 4

1,420 points

Jun 14, 2020 2:09 AM in response to Ace2008

Which version of logic?

if it’s updated to 10.5.1 because you have auto update on, it will revalidate your plugins, this can take a while, just leave it and go get a coffee and see if it has done.

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Answer 2

Ace2008 Author

Level 1

10 points

Jun 19, 2020 2:55 PM in response to iminertia

You are right. They deleted the file com.audiounits.cache, and then stopped the audio unit scanning. Logic then worked. Next I was told to move the audio units out, and then back in one at a time until the offending one was identified. As I had never used any of them, I deleted them all and Logic works fine.

The problem appears to be Apple doing updates to the OS which causes certain old audio units to become incompatible. It's up to the unit manufacturer to ensure ongoing compatibility, and they don't.

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Answer 3

Iaamusic

Level 4

1,420 points

Jun 14, 2020 7:10 PM in response to Ace2008

It certainly shouldn’t take an hour!

which third party plugins do you have or have you loads? Have you the time to test them by reinserting them (if you’ve not got loads) and seeing which it is struggling with?

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Answer 4

Ace2008 Author

Level 1

10 points

Jun 14, 2020 7:39 PM in response to Iaamusic

It didn't take an hour. Logic just stopped working and no error messages were provided. AppleCare resolved the issue, but deleting files from the cache.

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Answer 5

Jun 15, 2020 4:32 AM in response to Ace2008

What files did they have you delete? I’ve tried to delete the cache but then it just reloads plugins however it still hangs for me. Only work around I have found is moving all components out of their location

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Answer 6

Ace2008 Author

Level 1

10 points

Jun 14, 2020 2:45 PM in response to Iaamusic

My version is 10.5.1 and I have left it for more than an hour and it hadn't started, so I started it with Activity Monitor running, and that showed Logic as "not responding" so I assumed that it had failed.

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Answer 7

Ace2008 Author

Level 1

10 points

Jun 14, 2020 6:26 PM in response to Ace2008

I logged a case with AppleCare and they assist me by clearing the cache and restarting. The audio plugin scanning fails again, so I took all plu ins out of their folder and then Logic Pro works perfectly again. It seems to me that the latest OS update caused them to become incompatible.

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Logic Pro X stopped working today

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