"Error initializing CoreMIDI when launching Logic."

Question

wiesbadern Author

Level 1

4 points

"Error initializing CoreMIDI when launching Logic."

CoreMIDI initialization error when launching Logic, even with no external devices connected

MacBook Pro 16″, macOS 15.6

Posted on Oct 29, 2025 5:44 AM

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Answer 1

Iaamusic

Level 4

1,420 points

Nov 10, 2025 11:13 PM in response to wiesbadern

Has it always done this or just recently?

any changes you have initiated which may have preceded it?

Check - Open Audiomidi setup app on your Mac,

open midi studio view

What’s connected?

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Answer 2

yoyoBen

Level 4

3,403 points

Nov 20, 2025 11:57 AM in response to wiesbadern

Does Logic's Project Sample Rate match with the sample rate of your sound card?

File > Project Settings > Audio > Sample rate

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Answer 3

wiesbadern Author

Level 1

4 points

Nov 19, 2025 2:43 PM in response to Iaamusic

Hello, this error has always been there, it didn't appear after any of my actions, I don't have MIDI devices and they don't show up in Logic, but the MIDI-related error was there from the very first time I used the app

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Answer 4

wiesbadern Author

Level 1

4 points

Nov 21, 2025 12:08 AM in response to yoyoBen

yes(

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